Tunnel Ram Holley Carb Dragstrip test

The age-old debate between Holley Vacuum Secondaries vs Mechanical Secondaries gets put to the test!!! We test a pair of Holley 1850's that have been dialed in AGAINST the Famous pair of Holley 4224's 660 Center Squirters that have been modified by AllState Carburetor in NY with Annular Boosters and a bag of other tricks!!! Please like, share, and subscribe... and Stay Tuned as we put these Carbs to the test!!!! Dyno Time!!!!
#Holley #Tunnel Ram #Allstatecarbs
Special Thanks to
Joe Davis, David Vizard, Micah Monteleone, Eric, and Lane Hester, Tony Brown of Union County Dragway, and Jim from Allstate Carburetor

[@stephenmitchell3569]

This new generation doesn't know the fun and looks of a tunnel ram. Still got a few 660 old school in the barn...lol! Thank You for sharing!

[@UnityMotorSportsGarage]

Brother you hit it!!! I don't want our old school hot rodding culture to die!!! I pray that this Channel helps prevent that!

[@UnityMotorSportsGarage]

You say Center Squirter and they just look at you!!! Lol

[@crazyoilfieldmechanic3195]

Where you saying you had some 660 carbs in the barn or were you implying you have some cars with tunnel ram and 660's ? I'm looking to buy a pair of 660's if I could find some.

[@stephenmitchell3569]

@@crazyoilfieldmechanic3195 I've got a 496 in 78 C-3 Vette and trying to figure out how to twin turbo a tunnel ram with two 660! Why? Pure grins and who put a 496 in a 78 Vette except a gear head with stage 3 NOS...lol. Tuning will be a bear or worst but have O2 sensors on all primary header pipes. Then after the laughing guess have a few 660 looking for a home. I had a speed shop in the 80's and lot of goodies left over under the bed...lol! Anybody seen twin turbo tunnel ram on Big Block Chevy?

[@chrisguerra2341]

Great job buddy spending time thrashing and sharing the data with the world

[@Steve0newsome]

Just Suscribed yesterday, Great channel!

[@UnityMotorSportsGarage]

Thank you Sir!! Please help spread the word!

[@loganmpe7559]

Of topic but oh my my I just can't get over that sound! Casper screams like nothing I've ever heard for a street driver! And I've been hearing them for 50 years. It's unique!

[@baby-sharkgto4902]

I'm really liking your old truck

[@UnityMotorSportsGarage]

Thanks, that means alot to me! It has been a work in progress but it has become part of the Family! My girls would kill me if I ever sold it!!! Please Subscribe and share the word!!! Because we have a new engine lined up for it!!! "Think Boss 429" in a different package

[@johnparrish9215]

Take a look at the Summit Carbs (made by Holley) and compare the features with the higher priced Holley and Demons. Large annular discharge boosters Dual power valves Dual feed float bowls Dual float windows, of the glass not plastic type No sink center hung floats The Summit 750 mechanical secondary carb is a hell of a deal at $320 VS almost twice that for the Holly or Demon. If you look up the latest episode of Engine Masters you will see one tie a very expensive Holley in power across the entire rev range.

[@UnityMotorSportsGarage]

The Summit brand carbs are a smoking deal!!! I did a bunch of Dyno testing Carb Boosters about 10 years ago.. On a heated intake the basic Holley Straight leg boosters do a great job, because the heat vaporizes the fuel for you... On a AirGap style manifold the stepped downleg boosters is almost a toss up compared to Annulars.. on Tall Single planes and Tunnel Rams... Annulars are the way to go!

[@JMKady76]

Man that little Windsor screams!

[@UnityMotorSportsGarage]

Thank you! It turns ALOT of heads around town!

[@kramnull8962]

That thing would rock in the 74 Granada sitting behind the garage....

[@shitbox7413]

I dig the truck, I bet it’s a blast on the street, I’ve always loved the sound of a SBF. 👍🏻

[@UnityMotorSportsGarage]

Thank you for the kind words!!!

[@frankieford7668]

I really like the 660s...on a tunnel Ram....They work well with a stick shift or transbrake....But the One area they dont work that well is the Foot brake....or Stabbing the throttle....they always seem to stumble....i think your truck would leave better with twin 650 double pumpers....theres enough "pump shot"...to eliminate that initial stumble when you footbrake a car or truck....keep testing...we enjoy it...👍

[@UnityMotorSportsGarage]

So far they seem to work amazing!! With all that I have done to them.. I can stage at idle and mat it on the last yellow...it will now spin the tires... We have a set of 650 and 750 DP's we will try in the future... But right now I'm digging these 660's!!! Thanks for the kind words and please spread the word about the channel!!! We have some cool stuff coming!

[@keithclark3079]

Your engine has a very unique sound, Awesome indeed Just found your channel, will be Following here in So.Cal.

[@UnityMotorSportsGarage]

That is so awesome, Thank you please share the word... I have many more vids coming!

[@mikasantos3774]

Pull off the mechanical fan and run an electric fan or at least just to test it pull the mechanical fan and do one pass guaranteed 3/10ths off the time slip

[@UnityMotorSportsGarage]

We will be doing that test here in the near future!!! Stay Tuned..

[@jeffrey4547]

we had a fan on a built 327 and it was all out for pump gas we had to drop the fan because the engine would rev. so fast the rest of it could not keep up and would twist the steel crank end right off at 5000 to repair it cost was way to high but the engine came out of rick news dragster then we put 25000 in to it to give an idea what we had

[@jeffrey4547]

@Brandon Carpenter i guess u are right that old man bell did not know what he was doing because this was out of his mouth and that this is exactly what happens when u build the shit out of a engine and don't drop the belt it will twist the crank right off but u need to really build it not no flat track engine that is a joke to drag engines most of ur flat track engines are mostly stock do u even know who bell is only a legend at building racing engines and after dropping the belt i never twisted the crank off y do u think drag cars don't run belts because they rev too quick for them just like u would say that my 327 would not do 15,000 rpms but it as been there a few times this is a hole different level of building engines then a flat track engine just like blowers will twist the crank right off the heads i had were 202 angle plug ported to 204 and we ported the ports witch stander headers do not fit u have to get custom headers to cover the ports witch this kind of work cost over 4000 to do to a set of heads did u guy's put that kind of money in a flat track engine did u guy's season the block witch takes a year to do i don't think so then u will say on pump gas u can;t go over 10.5 to 1 on compression but i was running 13 to 1 on pump gas 92 octane but the book will tell u the highest u can go is 13.5 to 1 on 92 to run 87 i would have to change my timing then when u build a engine most people do not understand about the balance of a engine most people think balance the parts yes that is just part of it u also need to balance the flow air and fuel when u get that perfect it really comes a live just like under cab u can over cab this y dyno tuning is important but how many time u guy's dyno tune ur flat track engine never i bet because it is not cheap but u most have balls of steel to say old man bell don't know anything this is the man that helped me for years plus i lived next door to terry fisher for years i get parts from these people all the time second had but they work not only that u can say anything u like to me i will just remember it because i have one of the best project car collection i only keep rust free cars part and scrap the rest i scrap cars that would blow ur mind but i can only have 10 acres of project rigs most of them i got free i can even teach u how to get good engines like a ho 454 or a 440 mag i just got 2 ho 454 crate engines for free one has 6000 miles on it the other has 38,000 on it both have steel cranks heavy rods witch to go and buy complete new is about 12,000 and they both came with heavy duty 400 turbo's witch has the heavy pump heavy clutches just needs a stage 3 shift kit but then again i don't know anything so good luck with it then i just picked up a 79 short box 4x4 with very low miles on it in perfect mint condition been parked in a shop it's hole life full option truck 400 sb with 400 turbo for free plus got a bunch of other rigs with it last week i got a 65 short box chevy all complete just don't run with a 283 in it for a 100 bucks just a little rust in the front fenders in front of the doors but have good fenders fore it just gave my friend a newer chevy 4x4 with a ls 350 in it for free just needed the transmission rebuilt u should see the high boy i got for 250 bucks dana 60/80 but then again i have no idea what i am doing this is y i could retire at 42 and get a check every month and have no bills but internet and taxes witch is under a 1000 a year so i can build cars for a hobby means u know so much about drag racing on the west coast witch is the best 1/4 track to run but if u don't live on the west coast no need to answer but if u do then u would know if u been on all of them . plus i have a road we drag all the time by my house just about every week end that we are not at the track and if u want to drag race my class on the street is full body cars factory models not cutting down weight pump gas only no nitro street tires must drive on road no trailer queens drive train all out but u have to run pump gas only is the trick so do u run boost or not and just go with tunnel ram u probably go boost do u go fuel injection or carb witch will work better can i run a peddle or do i need help with tuning now i read the first line of u the quit if u read all of this i made it were i used no punctuation in it just so if u read all of this u are an idiot

[@jimkillen1065]

Yea I was shocked how much hp can pull at 7k plus

[@chadpukaite3775]

Tunnel Rams are the best, ran one on my sbc with two mechanical 750's for yrs, great power.

[@UnityMotorSportsGarage]

I agree... They get a bad rap because of other issues... With just a bit of time and effort they make for the ultimate combo for power!

[@bluecollarcook]

Another great hotrod video.

[@UnityMotorSportsGarage]

Thanks Brother!

[@1957kwick]

I noticed the last pass you made your tailgate was up! That thing sounds SWEET!! 🛠

[@UnityMotorSportsGarage]

Yup good catch! Believe it or not.. it doesn't seem to make a difference in ET or MPH in the 1/8th

[@kramnull8962]

According to Mythbusters back in the day, the tailgate makes a circle of air between itself and the cab of the truck and functions just like a camper shell in a way.

[@UnityMotorSportsGarage]

Yeah it's hard to make a 2 ton brick slice through the air... lol.. just need more power! Thanks for Watching Andy

[@kramnull8962]

@@UnityMotorSportsGarage What's harder to do, is changing the king pins in those 60's Ford F100's. I think you got the power thing under control... Keep on Keepin on...

[@UnityMotorSportsGarage]

@@kramnull8962 Amen to that!!! Changing King pins is NO joke! I did mine when I converted my front drums to disc brakes..

[@rickboretirementplan]

That truck is cool but that is a lot of weight for the small engine. keep on keeping on.

[@UnityMotorSportsGarage]

You are so right!! But I'm getting ready to make an announcement on that... Casper is getting ready for an upgrade and it will blow everyone's mind! Please Subscribe and help me spread the word!!!! Because it's going to be good!!

[@rickboretirementplan]

@@UnityMotorSportsGarage I will sub for updates, also check out my 67 Camaro.

[@jameywhite6055]

I CAN'T WAIT TO SEE IT ON A DIET!

[@mikasantos3774]

Great video hope to see you more

[@UnityMotorSportsGarage]

Thanks! I have many more vids coming up!

[@ronaldlewis4032]

I didn't see your traction bars! I bet a set of Cal Tracs bars will hook you up. I didn't know if your on 4 links or what!! Truck sounds great and probably 3 or 4 tenths easy ! Happy racing and thanks for sharing!

[@UnityMotorSportsGarage]

Ronald, it does have Cal Trac bars.. which make a huge difference! Thanks for the kind words... I can't wait to get MIXED UP BOSS in it! Thanks for Watching! Andy

[@davidreed6070]

I've used double pumps on wild BBC's and usually vacuum sec on sbc. I learned from David Vizard. U are lucky to know David vizard. I enjoy your videos, keep them coming. I am retired but my son has an s10 so now it gets a 6 liter with 2 66. 82s a. 105 ar this will be my first for turbos. In the day I would have been the fastest na on the street.with an ls,I have the 823 heads they flow 315 factory. They will make big power.

[@UnityMotorSportsGarage]

Yes, they are some sweet engines! That thing is going to make a ton of power! Thanks for Watching Andy

[@jeffrey4547]

a lot of people do not understand the tunnel ram that is there first mistake we built a nuts 327 with a tunnel ram the trick with tunnel rams is the compression the higher the better . we were running 12.5 to 1 then we shaved the heads got it too 13 to 1 and all we ran was pump gas no nitro we got up to 25 mpg in till u step on it then it was a 2 gallons per 1/4 mile the engine was built by old man bell

[@thrashed22]

I don't think there's a huge debate between mechanical having a little more power than vac secondaries, it's how much of a difference that is. You'll use a lot less gas with carbs out of the box using a vac secondary carb compared to mechanical secondaries. The difference I saw in my Dad's BBC, was about a .1" slower with a vacuum secondary but used a lot less gas at the track. You've done some great tuning, so I think you have a much better debate to discuss. The internet trolls love double pumpers, but the vac secondaries are very good once you've done some spring tuning.

[@UnityMotorSportsGarage]

I agree... If you put the work into VS carbs they can run very well! I know on CASPER I spent a ton of time dialing the 1850's in and they held their own against some prepping 660's! Andy

[@woodey028]

Hi Andy. I wanted to let you know I am sending my Holley 9776's to All-State for rebuild. Thanks for the link, and videos. I'll let you know how it works out once I install them.

[@UnityMotorSportsGarage]

I think you will be happy! Keep me updated.. Andy

[@tomnekuda3818]

Really enjoy your vids but, damn, spend a couple of bucks on a good microphone pick-up and I'd love 'em. Sold my 660's years ago....why in hell did I do that? Good move on the power valve installation; I set mine up years ago in that fashion for the same reasons you stated. It is so easy to blow off the tires with two center squirters because they are right there, right now. Good luck on dialing the suspension.

[@johnnycole7990]

Love how that truck revs up

[@UnityMotorSportsGarage]

It would twist up quick! MIXED UP BOSS should be even better! Andy

[@stevesolo16]

I enjoyed the video very much. Have you adjusted the suspension so the rear-end dropped/hooked up better? That's what I would try.

[@erikherrera9527]

Is it me or this guy looks like Will Ferrell.. love the video

[@cavscout62]

No. It’s just you.

[@ledbetterjack]

Truck looks good & sounds great. With those ET's it's got to be a blast to drive. What does it weigh? Suspension mods? Gear? Tires? Thanks for posting

[@UnityMotorSportsGarage]

Thanks for the kind words!! It has a weight of 4060lbs, I'm Running a Dynamic Racing Mighty Mite M2 fully rollerized C4 with a 9" converter 4500 stall with Mechanical Diode, Stock Suspension Twin I Beams, And Leaf Springs with CalTrac bars, Strange 9" rear with 4.33 gears and 275/60/15 MT ET Pro Drag Radials...

[@ledbetterjack]

@Unity Not bad times for 4000 lbs., thanks for info

[@davidandrew2610]

Hey man thanks for posting ,I like your truck , is the truck running a 351w ? And what make is the tunnelram , looking ford to more clips , cheers

[@UnityMotorSportsGarage]

It is a 393w and I'm running the Holley Hi-Ram for 8.2 deck engines with PriceMotorsports Adapter plates.

[@davidandrew2610]

Thanks mate , I appreciate your reply , I have acouple 351's on the boil and I have a thing for tunnel rams , cheers and good luck m8

[@aaroncooper858]

Truck would look way better without that mailbox on the hood. Engine sounds wicked

[@UnityMotorSportsGarage]

While the scoop is a Love it or Hate it type of deal.. to me its about trying to be period correct I had a Boss 429 Type Scoop that looked pretty good but with the new Hi-Ram it had to go... :(

[@brettalder3129]

Just curious if you played with the diagram springs on the vacuum secondaries? Made a huge e difference on my 3310 going from the plain to the purple spring. Also unless the vacuum secondaries had annular boosters you have made 2 changes. So it’s hard to assign what specifically made the change. You have a good channel that is realistic & fun to watch.

[@jeffrey4547]

i got a 68 chevy pu with tunnel ram street truck i put a stroked or 4 inch stroked 454 in it best part the truck has no rust good clean body factory paint needs paint got it all dun but finish paint and interior only have 2300 in it right now my side project is a 70 high boy with dana 60/80 lockers with a 390 4 speed so far i only have 250 bucks in it with extra 2 front clips , doors , hood , chrome trim a big pile of it big box of lights and emblems has tool box on side no rust clean body

[@UnityMotorSportsGarage]

That is what Im talking about!!! I love it.. those 67-72 Chevy trucks are sweet.. sounds like you have a perfect FORD/Chevy match... Thanks for coming over! Please Subscribe and help us spread the word about the channel! Andy

[@jeffrey4547]

@@UnityMotorSportsGarage i have a lot of rigs some restored some just drivers a lot of projects and parts

[@tomrose6292]

I used to have a ram ,2 600's and my motor was pretty gutless untill about 3000rpm..but look out when the rpm's pasted that. I ran in the 7's. Mine saw street miles also. Just went back to a single

[@jamesford2942]

Does the vacuum secondary setup have a problem with uneven fueling from side to side on the motor? I would think that having the carbs crosswise it would get more fuel on the right side until full throttle and wound out where the secondaries are wide open as well. Do you run separate AFR on each side to see how it is fueling? I'm looking at doing a tunnel ram with AVS2 carbs on it they will be mounted fore and aft.

[@UnityMotorSportsGarage]

James I do have 02's in both header collectors there is a slight difference between banks at part throttle but you have to remember that 4 butterflies are opening at once so it doesn't take much throttle opening cruising around but once you hammer the throttle the afrs stabilize pretty quick once the secondaries open.. Hope this helps Andy

[@jamesford2942]

@@UnityMotorSportsGarage thanks for the reply Andy, that helps.

[@cobrajet8866]

I look forward to seeing you at the strip sometime. Come to a SEGA race and let me see that truck.

[@UnityMotorSportsGarage]

I don't know where you are located but I hit up all of the local SEGA races here in NC/SC

[@cobrajet8866]

I'm in North Georgia and will be looking for you at every race I go to. I would like to meet you and talk ald ford autolight 4100 carb. I would like to show you my 63 fairlane wagon with a 1989 302/AOD and a 4100. It runs great; Im playing the jet game and will soon buy an AFR meter to fine tune it. Im done tuning by ear. I can get close but you have knocked a home run with 16MPG on Casper. SMART vidya. And I like the comment that you can contend with any computer based car with analogue carbs, vacuum, and timing if you know how. Thanks

[@UnityMotorSportsGarage]

It just takes a bit of time and patients to learn what your motor wants... Then figure out how to make that happen! Andy

[@cobrajet8866]

@@UnityMotorSportsGarage Thanks - I got the vacuum gauges. Stay tuned

[@shawngarrison1148]

Just recently found this page, and I'm enjoying all the carb info!! Thanks!! I'm curious as to how you have the 1850's set squirter nozzles, big pump/lil pump, cams if lil pump, jetting, vacuum springs, secondary plates, boosters? Curious because I have a healthy 454 and having never ran a tunnel ram before wanna be in the park when getting started. I'm gonna run 1850's on a late 60's early 70's Weiand tunnel ram. Any info would be greatly appreciated!!

[@UnityMotorSportsGarage]

Shawn I had 35 squirters with 50cc pumps. I had machine stepped downlegs put in the mainbodies... I tried all of the springs... Yellow turned out to be the best and I had both vacuum pots tied together with a vacuum line... I would start with 66 jets and go from there... Hope this helps a bit.. Andy

[@shawngarrison1148]

@@UnityMotorSportsGarage Thanks so much for the reply! Did you start with your idle circuits restricted with a wire or leave them stock in the beginning? I know you made it a jetted circuit later. The truck sounds so smooth going down the track with both set ups. I already have the 1850's so that's where I'm gonna start. Maybe some 660's in the future. Thanks again for the info and great informative videos!

[@UnityMotorSportsGarage]

I started with the wire trick and got it close to where it needed to be...the problem for me was finding the right size wire.. so once I seen I was making progress...that is when I decided to make my own restrictors so I could get it right... But the wire trick will get you in the ballpark... You wouldn't believe how smooth it made it just putting around town... Also having your vacuum advance will play a huge part in low speed drivability... Andy

[@Wildkat-1]

Take the air-filters off at the track ..re-jet as needed ....you will get a more accurate tune-up ...then put the filters back on later...

[@dinosshed]

Tunnel rams and double pumper carbs will always make a dead spot from low throttle to wide open as the distance between the carb and the combustion chamber creats a lag between too lean and rich enough air/fuel ratio. Best to run a vac secondary carb to smooth that out or have a high stall on a trans brake. Only other option is to richen the idle bleed to run fat and sooty to compensate. Not good for street driving as the plugs foul and engine oil dilutes with fuel. Many give it away and run port injected efi or mechanical for this very reason.

[@tomrose6292]

That's so close to Doug herbert's old shop ,how couldn't he build good motors

[@UnityMotorSportsGarage]

I used to go by Doug's all of the time for parts! Thanks for Watching Andy

[@tomrose6292]

@@UnityMotorSportsGarage I bought parts from Doug too..cool guy

[@tomrose6292]

@@UnityMotorSportsGarage I built a 95 s10 with parts I got from him when I live in Winston salem.live in ohio now

[@UnityMotorSportsGarage]

@@tomrose6292 it was nice being able to have a place to go and get the parts I needed instead of waiting! Andy

[@joewiseman1541]

Think about put power valve in my 660 in front But I what keep inline. Will a 600 holley front meter block work with in the 660 ?

[@UnityMotorSportsGarage]

Yes!! It will work.. I'm using 4 primary metering blocks on my setup.. the IFR in the 600 blocks will give you a cleaner Idle AFR... It is a great mod... Now I will say this.. I thought having PV's in both sides would pay off... Fact Im still in the transition slot cruising down the interstate at 75mph!!! But once you feel the main circuit come on... It's like a shot of N20!!!

[@davidreed6070]

Its hard to beat a pair of tuned vacuum sec holleys

[@UnityMotorSportsGarage]

Yes David it is... The thing about the center Squirters is it hits the converter harder! If you have a street converter... A VS carb is the way to go! Andy

[@brentonk461]

With the simular problems, only 3/4 throttle I ran @90.55 mph for the 1/8th mile. Only mines a Small Block Chevy, single 4barrel.

[@UnityMotorSportsGarage]

What kind of car? It's hard to make over 2 Tons go fast! Lol

[@brentonk461]

@@UnityMotorSportsGarage 1977 HZ Holden 327, th400 & Ford 9", full length dual, twin 2.5" exhaust. Drive it to too the track.

[@UnityMotorSportsGarage]

@@brentonk461 that is pretty awesome!! Where are you located?

[@brentonk461]

@@UnityMotorSportsGarage Queensland, Australia. I only got to run it twice with the last setup, at Willowbank Raceway, before the track was shut.

[@UnityMotorSportsGarage]

@@brentonk461 wow... So how far is the closest track to you?? I love those Holden Engines! I wish we had them here in the states! They can make some serious power!

[@XrayxRich]

When you can't run you run in the 1/8th mile.

[@UnityMotorSportsGarage]

That is pretty much all we have here in the southeast! Ive ran the truck in the 1/4 mile and it would runs mid 11's Thanks for watching Please Subscribe as hopefully it will be a completely different animal with Project MIXED UP BOSS! Andy

[@onthemicwithtarencebaileys5684]

I'm putting a elderbrock tunnel ram on a fresh 408 chevy small block going in my 73 Nova. The mechanic told me to buy 600s. But, I can't remember what cam or other internals are in it and I'm waiting on the list. Are 600s too big? I'm also running 4:11 Dana rear 3 spd trans which I'm taking out for a 4 spd stage 3 from Monster. I have the frame stability bars etc. Retired track car from Delmar Speedway in Delaware. Any advice?

[@UnityMotorSportsGarage]

No, the 600's will make for a good setup! There are some things you will probably need to do to them to "Dial them in". 1st add 50cc Accelerator pumps to both carbs and run 31 squirter nozzles in both carbs 2nd tie the vacuum secondary pots together with a vacuum hose... This will make sure that the Secondaries open exactly at the same time 3rd. You will need to play with jetting. I ran 66 Jets in the front and enlarged the Power Valve Channel Restrictors to around .050" this is so you run a bit on the lean side during cruise but at WOT you have the fuel you need! If you have any questions feel free to hit me up! Thanks Andy

[@onthemicwithtarencebaileys5684]

@@UnityMotorSportsGarage really appreciate it. This is my retirement cruiser. Loud and fast

[@UnityMotorSportsGarage]

@@onthemicwithtarencebaileys5684 I'm going to do a video tomorrow on how to set your carbs up for a tunnel ram! I will show step by step.

[@onthemicwithtarencebaileys5684]

@@UnityMotorSportsGarage I'll look for it

[@markwhittington9121]

SINCE WHEN 1850 HOLLEY HAVE A REAR METERING BLOCK.

[@UnityMotorSportsGarage]

And stepped downleg boosters!!! I had worked them over basically to make them the best that they could be... I tried to run them with just the metering plates when I first started messing with Tunnel Rams years ago... I even ran the plates were you could run Jets in the plate. To get a consistent AFR the metering blocks are the easiest way to go... I even run metering blocks on my 4224's! It's one of the best things you can do to a Holley 4160 !!!!!

[@annrhoads6808]

Ur first thing is your running a Ford not a Chevy and second If you build the motor right on a chevy 1968 u better off running 750 Holly's Dubl pumpers no Vac Its hared to build good Vac with a high out put motor and a Tunnel Ram with Dual Carbs Sideways with bell cranks and I promise U friend I will drag you down the track

[@markwhittington9121]

And a 50 cc pump on the front.

[@peggyparrow2059]

Cant hear you?

[@richardkranium2584]

I am building a 347 clevor for my 94 bronco resto project and just scored an original Offenhauser boss 302 tunnel ram. Should I run 2x4 fuel injection or twin 1850 Holley's?

[@peggyparrow2059]

Cant hear you?