1990 c1500 How to swap tbi 4.3 to tbi 350

[@greddmyles3677]

My uncle has a 97 Chevy stepside came with a v6.he rebuilt a 350 4 bolt mane and he put it right in. Only thing he did was find a TBI intake to fit the motor and v8 manifolds. He kept the same throttle body from the v6 and it's riding like a champ .

[@konstanttution7319]

Those are vortecs though. I’m surprised you can swap those right out too like that. Good info

[@SHSPVR]

You mean he had to find a Vortec Intake which setup with spider injection as TBI will not work on 1996 an up and can not directly swap a V6 to V8 as wire harnesses are different so is the computer firmware becuase of additional wires to control the spider fuel injection with V8

[@xii-vi-mmviyt6506]

He didn’t change motor mounts?

[@chriscarrera3128]

Thanks for this video, I personally owned 5 Chevys and I currently now have a 95 with a 4.3 and I wanted to go ls but I don’t wanna deal with all the computer and wire crap so 5.7 it is and I can’t wait everyone else made the V8 swap sound like it was a night mare thanks again lol

[@konstanttution7319]

Yeah everybody else is saying it’s not even worth doing it’s so much work. Except this Chevy kid quite awhile back said you could do exactly this and not change the computer. Guess he was right nd all these older mechanics really don’t know as much as they think lol.

[@Aridrona]

Wonder if the stocky-pipe for the exhaust would work

[@Ricardargas-dy9tf]

Finally a straight forward video 👍

[@chrismooney5737]

That’s awesome makes me feel a lot better about doing the swap on my truck

[@PCBasics]

Awesome truck! My 1993 K1500 used to look like that but I live in Michigan and it caught up to it.

[@blockheadgarage7790]

Ya the salt will get to them fast, I park it in the winter

[@PCBasics]

@@blockheadgarage7790 That's my plan. I am going to get something a bit newer so I can make it a show truck (all stock).

[@blockheadgarage7790]

@@PCBasics ya I regret putting the 14 bolt in it

[@wildestcowboy2668]

Heady d seems like he is being honest, I think he do a good job.

[@snoofayy6150]

hell yeah buddy, gonna be swapping a 1990 tbi v8 into my 1994 tbi GMC safari with the 4.3 down the road, picking up the engine this Sunday

[@broncobill1204]

Did you ever get the swap done?

[@snoofayy6150]

@@broncobill1204 she's still my daily driver and I have no room to keep another beater to daily, not yet brother!

[@jordantovar6855]

​@@broncobill1204I'm in the process

[@guruofdirt1]

I have a 1994 5.7 4x4 5 speed frame is bad from up north. Bought a 1998 4x4 5 speed with 4.3 vortec solid frame and body. Looks like I swap motors, radiators and some wiring. Both are work truck editions so stick 4x4 shift also

[@ANDERSONEXPRESS7]

I completely redone my 1988 and because I actually love the 4.3 i got a remanufactured one that was identical and slapped it in haha

[@stationarytroll2567]

Where's a good place to get one? mines going and I don't need anything bigger it does plenty. I don't know where to even start looking.

[@loganarnold00]

@@stationarytroll2567maybe summit or jegs or just start Google search

[@Spudderr]

When you swap the mounts are the bolt holes already there and tapped? Also can you use the 4.3 clam shells on the 350?

[@blockheadgarage7790]

No there are nuts on the back side and you have to go up Who were the bottom a arm bolt to the frame and no the 4.3s sit back about 3 inches

[@marybond9887]

@@blockheadgarage7790 what flywheel and clutch did you use?

[@blockheadgarage7790]

@@marybond9887 luk off of summit

[@boblembke5256]

What engine mounts did you use. the 4.3 has thre rubber mounts bolted to the engine and adaptors that push the motor back. I am lookiing at putting the mounts from the 43 block onto the frame of the truck, where did you get the steel mounts to bolt to the engine?

[@blockheadgarage7790]

They came with the motor, call around to some junk yards they will have them

[@sonicboom2723]

Can you use the tbi from the v6 and bolt on to the v8?

[@blockheadgarage7790]

Yes but I just changed 2 plugs

[@telecasterfool1773]

the 4.3 computer may work, but it won't be right. As someone who programs one of these computers on my truck, I can tell you the tune is set to a specific number of cylinders. The fueling and timing may not be great. You can pull the two chips from a 5.7 computer (there are different 5.7s) and place them in the 4.3 computer. One chip is for the limp mode tune, one is for the running tune. A computer from the same year should plug right in. I use a computer from a 2500 van on my 4.3 truck.

[@blockheadgarage7790]

Everyone said I needed to change the chip but I didn’t and it runs perfectly fine

[@wildestcowboy2668]

@@blockheadgarage7790 I glad you told that Joe Biden loving gun banning clown off. He a kno it all man, u did a good job brotha!

[@NightshiftCustom]

@@blockheadgarage7790 i have been running mine like this for a few years now and does seem to run pretty good. maybe not as good as it could but no big deal. you running the injectors for the 5.7 I'm guessing ? going to LS swap mine anyway is my plan haha

[@shootermcgavin2819]

@@NightshiftCustom you don't need to be like every one else in the sheep crowd and LS swap everything in sight. LS engines have valvetrain problems and leak everywhere. Modern small block chevy cylinder heads flow amazing numbers and match that with a better camshaft you have stock LS power or more without having to retrofit the vehicle. No raspy high pitch sound offered by the ls either. Lots of options.

[@NightshiftCustom]

@@shootermcgavin2819 already have a LQ4 6.0L out of my Denali that makes way more power easily then any 350 small block Just need a turbo or 2 and it will really wake her up And the only leak its ever had is the exhaust manifolds lol

[@Alto_chris]

What flywheel and clutch did you use and is it a nv4500

[@daniolvera8658]

Did you use the 350 flywheel and clutch ?

[@dalelowry5633]

Nice job!! I am getting ready to do my 94 as well. Can you shoot me the model number of the motor mounts you used? frame and engine side. Thank you very much!!

[@blockheadgarage7790]

Ani-2621 and on the motor side I just used the ones that were on it

[@johnmartin560]

1994-95 TBI computers were different from 1988-93 that's why it wouldn't connect to the harness. Is it still running well? Have you changed anything over the last couple of years? I'm about to start gathering parts to swap my 94 4.3L to a 5.7L tbi, and keeping the NV3500 transmission. If I can get away with just changing fuel injectors that'd be great. I don't really want to dive into the world of GM OBD1 tuning; I have too many projects as it is.

[@alejandrogonzalez9910]

Im currently doing the same swap using the 4.3 harness. Noticed the knock sensor is on the oppsiste side with the 5.7 -What would you say splice and length the connector it to reach opposite side or is there another solution?

[@alexszavala6671]

​@@alejandrogonzalez9910 I'm thinking about doing the same on my 95 I have a 350tbi out of a 1990 I'm just not too familiar with it

[@buildobs_mike2500]

I’m planning on doing this I have a 5 speed 4.3, was it necessary to change flywheel and clutch?? Or can I just mount a 350 with v8 mounts??

[@blockheadgarage7790]

I think the 4.3 flywheel will work but I would get a new one and a new clutch. Might as well since you have the motor out.

[@buildobs_mike2500]

Thank you man, appreciate the information

[@konstanttution7319]

So yes? You get a different clutch or is it the same ad you just put a new one in? And is it the same type of flywheel or same thing the clutch and flywheels are different for a 350?

[@JuanGarcia-kl9xl]

Also wondering if they share the same flywheel and clutch.... Thanks in advance

[@zhpike0478]

I'm gong to be doing this exact same swap soon.

[@konstanttution7319]

Thank you though because my v6 is almost toast if not already, I’m working on it now. Don’t know if it’s going to run anymore and it’s easy to find a 350 and a lot cheaper than if you were lucky enough to find a v6 used that worked let alone buying one new holy cow! How bout leave springs and stuff that’s all ok? Because I was told you’d have to change them for a 454 swap. That’s all ok with a 350?

[@blockheadgarage7790]

I didn’t do anything with the suspension

[@ajrittenhouse2704]

What’d you do about the knock sensor the 4.3 one is on the driver side but the 350 one is on the passenger bottom

[@blockheadgarage7790]

I’m not sure i know I had to change a couple plugs

[@esaymoney6888]

yo bro i just did this swap i had a 1994 4.3l tbi with nv3500 and put a 1990 5.7 tbi in it i used the 4.3 harness and ecu but changed the chip to a 5.7l with 4l60e transmission should i just use my old chip?

[@Teksohpöt]

Do you have any socials? My truck engine blew up and I need to take the 4.3 out of my 1990

[@sumokii9320]

Ive heard you need new flywheel? is that true? I have a 4.3 with manual trans (nv3500?) I'd like to replace with a 305 or 350

[@blockheadgarage7790]

I got a new one off summit

[@jontonomousw7161]

Hey man, have some pride in your build, clean it up, a little degreaser and spray paint go along way... yay an engine swap, but it looks low am old worn 350...

[@blockheadgarage7790]

I was 15 when I did the swap. It’s getting a 454 so who cares.

[@mikee5075]

Got a carbed 350 from a 95 k1500 need to swab it into a 99 suburban that has the vortec intake so it has efi can I swap em motor in the suburban has spun bearings

[@Viejito-zq4em]

I did my 95 didn't had to replace any harnesses plug just extended the nock sensor and temperature sensors on the head

[@jrperez9062]

When swapping to a 350. Do you need a bigger fan? Bigger radiator?

[@blockheadgarage7790]

Ya just order a radiator for a truck that has a 350 in it and I had a parts truck for the fan shroud.

[@MannyAZ]

What wires did you get off the 5.7 tbi harness

[@blockheadgarage7790]

Throttle position sensor

[@petrichorintake8137]

Hey, I have a 89 k1500 I want to drop a 350 into it. I wish you were around to help me do it. Do you have any information, like videos and websites, you can share to help me do this myself? I have worked on many of my own vehicles I just need a guide. I was hoping to be able to get rid of the tbi system...have you heard of anyone who was able to do that?

[@blockheadgarage7790]

Shouldn’t be too hard to swap it and you will have to get a different intake manifold if you want to get rid of the tbi

[@pamvincent9941]

Since the motor is coming forward about 3in will the fuel lines still work

[@blockheadgarage7790]

Ya they still work

[@josecastillo9404]

Would I have to swap my transmission? Or will the one off my 4.3 work on a 305 or 350

[@blockheadgarage7790]

The one off the 4.3 will work

[@figurefour633]

1987 to 1993 TBI engines do not have a cam and crank sensor that must be why he didn't need to swap the ecu for the 1990 engine. 1994 and 1995 has a cam and crank sensor. the ECU will have a different timing for the V8 vs the V6, which will be determined by the tune on the ecu.

[@tre9563]

Do you have the getrag in that

[@bikelifeel2187]

What headers can I use the stock 4.3 headers on the 5.7

[@blockheadgarage7790]

No there totally different

[@RT-df3ze]

In the temperature sensor you only change de plug o the sensor to

[@blockheadgarage7790]

Yes, but I just put a mechanical gauge in it

[@RT-df3ze]

The v6 computer is the same to the v8 or not

[@blockheadgarage7790]

I’m not 100% sure if there identical but they have to be close because it runs fine

[@trentwright3409]

Same

[@josetrillo7306]

Any updates?

[@blockheadgarage7790]

It will be a year next month I did the swap and have had no problems

[@ANDERSONEXPRESS7]

How come u swapped motors

[@blockheadgarage7790]

Wanted more power

[@ANDERSONEXPRESS7]

@@blockheadgarage7790 also how come u got rid of the a/c

[@blockheadgarage7790]

@@ANDERSONEXPRESS7 needed a compressor and it was like 15 bucks for the delete pulley but eventually going to put a compressor back on it and get the ac working

[@mayito2651]

Is it the same thing with a 5.7 vortec?

[@blockheadgarage7790]

No there a lot different

[@mayito2651]

@@blockheadgarage7790 how so?

[@blockheadgarage7790]

@@mayito2651 the wiring harness and intake, they have a lot more wiring

[@YordiRuiz-fh2nl]

Get a tbi intake manifold to fit 5.7 vortec heads

[@thechump10]

How's the trans holding up?

[@blockheadgarage7790]

Just fine

[@jaylonkeys8239]

Can I put a carbed sbc 350 in place of the 4.3 and would it be easier

[@blockheadgarage7790]

Honestly no, a tbi 350 would be easier

[@jomarpainting.elmilusos376]

Hey I have one truck 2001 engine 4.3 I need make 6.0 I can o no

[@albertreyes7624]

Man I need some advice

[@TheSteelerfool]

What year 350

[@blockheadgarage7790]

1994

[@SHSPVR]

you rigth you can swap the TBI v6 to TBI v8 88 thru 91 without much to change but if have a spider injection v6 or 4.3l you can not you can do this with automatics too however be aware that the V6 transmission it's not built as strong as the V8 so you may want to swap to 700R4 or rebuild your 700R4/4L60

[@blockheadgarage7790]

Actually 88 through 95 every thing is pretty much the same. Vortecs didn’t come out till 96

[@SHSPVR]

@@blockheadgarage7790 Vortec v6 come out 95 in the Astro vans I know I had one and it was all-wheel drive and had spider injection keep in mind that 91 thru 95 trucks had some change as I have 1988 C2500 and in 96 the V8 Vortec come out you can adapt them to accept TBI injection with rigth parts

[@blockheadgarage7790]

@@SHSPVR the motor I swapped in is out of a 94 they are the same till 95.and you will have to swap the whole wiring harness if you want to use a vortec they are a lot different

[@SHSPVR]

@@blockheadgarage7790 No with the Vortex 350 from 1996 to 2002 they to can be swapped into older vehicles all you need to do is change the intake manifold with a standard Vortec Carburetor Intake than all you need to is get TBI adapter that bolt right on top of the intake manifold. And what I am referring to is the Vortec 4.3 that comes with spider injection system you cannot easy swap too V8 motor because it dosen't have additional wires to make all of injectors work and few other thing and still need V8 computer unlike the early OBD 1.

[@blockheadgarage7790]

@@SHSPVR why do all that when you can just throw a Hei and a 4 barrel on it.

[@Mrmudbone_gaming]

Where did you get the motor mounts?

[@blockheadgarage7790]

Summit

[@Mrmudbone_gaming]

Did you drill holes for the new motor mounts on the frame?

[@blockheadgarage7790]

@@Mrmudbone_gaming no they bolted right up

[@Asp1resDS]

Old truck, Mullet hair, cap. redneck and swap to 5.7... it is most american video i ever saw