Mopar RT 318, 340, 360 cylinder head casting

Gq stopped by with new goodies to check out! Cool stuff!

[@paintnamer6403]

This is a very informative video about these heads. I have mostly worked on big block mopars but have done port work on a variety of heads and manifolds.

[@servediocylinderheads]

I am glad you like it. Thanks

[@brucesherrill4116]

Glad to see you back! Hopefully you have been working on mission impossible stuff for DV.

[@servediocylinderheads]

I have, deep down the rabbit hole! Stay tuned.

[@willt9975]

Thought those were mine for a minute. Mine were black orange and purple too. lol. Mine are in the machine shop currently. P5007140 is the full casting number. The Mopar performance pn’s were… P5007140- Magnum R/T bare machined cyl head- machined for 1.92” intake/1.625” exhaust P5007141- Magnum R/T bare machined cyl head- machined for 2.02” intake/1.625” exhaust P5007145- Magnum R/T head assembly with 1.92” intake/1.625” exhaust- Includes high performance valves, single springs, and retainers. Unfortunately all those part numbers are Discontinued and no longer available. I was just looking for new valves for mine, just last year MP quit producing the stainless 2.02 intakes.

[@grahamm3559]

Very cool. Good to see Charlie has resurfaced! Always look forward to your videos.

[@servediocylinderheads]

Thanks! Not dead!

[@donthompson2188]

Nice Charlie

[@servediocylinderheads]

Thanks

[@MidnightOilsRestoration]

Thanks Rob and Charlie, I'll be keeping an eye out for these. Very nice

[@servediocylinderheads]

I would. Thanks

[@Robs-Garage-experiments]

These are super hard to find. As luck had it, the fella that had these was up for a trade. So parts went a flyin across the country.

[@briantayes2418]

Of course we missed you!

[@servediocylinderheads]

Thanks!

[@bcbloc02]

They certainly made a lot of different castings over the years.

[@rayowens4355]

I have heard of the r/t heads but i wasn't sure they really existed!

[@servediocylinderheads]

Pretty sure they do, how plentiful???

[@aaronbarnes8938]

I have 2 sets of these RT heads one off the 402 Mopar crate with the 2.02 intake and a set of 7140s with the 1.92 intakes. Mopar claimed 180cc runners.

[@servediocylinderheads]

Just send them to me. Thanks

[@aaronbarnes8938]

I would like a set ported and have been looking for someone

[@servediocylinderheads]

@@aaronbarnes8938 Contact me @ [e-mail] Thanks

[@DrGo-bw2jy]

If you would consider selling the small valved set, let Charlie know and he could get a hold of me as he has my email. I am hoping you would want the large valved set to have Charlie do his port magic. If you are keeping both sets, I would understand.

[@aaronbarnes8938]

Just seen your message sent my contact info to you @@servediocylinderheads

[@clarkmcmahan1595]

Great vid..it's nice to see a set of factory heads work as well as those can ..makes you want to build a striker with mild cam for pump gas or E=85 and go terrorise the streets 😙😂😂😂😂

[@servediocylinderheads]

Mild?

[@Robs-Garage-experiments]

I like the thinking. Mild is pretty subjective. LMAO! Do you remember the TV show where they did a Magnum 5.9 and just added a stroker kit to a 408 & nothing else…. Now add these heads. Then add a cam. A short duration (that’s also subjective!) and a lot of lift.

[@brentonk461ismylostaccount]

Should be using those on the mission impossible project and port them up and do some chamber work along with your best manifold to suit.

[@servediocylinderheads]

They will make over 400hp just as they are. Thanks

[@brentonk461ismylostaccount]

​​@@servediocylinderheads400? Probably make 500 with those R/T heads a bowl blend with the right cam and the right combo. Depending on how good you get the ports and how much material is in them maybe 550-600 horse with 2.02, or 2.05in 1.6exh and some porting a single plane intake and and a 850-950 Holley and a solid roller cam similar setup to my chev.

[@servediocylinderheads]

@@brentonk461ismylostaccount You bet!

[@robertwest3093]

The small heads flow surprisingly well for the valve size. Definitely better compared to the small block Ford 1.78 head. Those R/T heads are on another level completely.

[@servediocylinderheads]

I agree. Thanks

[@davidreed6070]

Taking the lip off of the intake going into the chamber would do wonders there.

[@servediocylinderheads]

A good cleanup, and these will rock.

[@rolandotillit2867]

Charlie is back!

[@servediocylinderheads]

Reports of my death were slightly exaggerated!

[@robertheymann5906]

Thank you sir

[@servediocylinderheads]

You are welcome.

[@TheProchargedmopar]

👍💪

[@rickyfulks889]

The RT is a much better head fosho

[@dang5553]

I keep hearing 140 heads as the RT heads any truth to that

[@servediocylinderheads]

That is what the casting number is.

[@DrGo-bw2jy]

Ok - maybe these are what I should be shopping for. If you have a set, you have my email. Otherwise, where do I start my shopping? Are these to be found on some junk yard motors of 318 vehicles that say RT or were these only a Mopar parts replacement? I want to search the best haystacks first to find that “needle “. Would I need to measure and provide new pushrods or will original LA stock 318 push rods work?

[@servediocylinderheads]

They are not on rt 318's.

[@DrGo-bw2jy]

Would they have been for 5.9 magnum 360s? Could they work on an LA 318 or am I barking up the wrong tree. Sorry for my lack of knowledge.

[@Robs-Garage-experiments]

I thought I was pretty clear on this in my opening statements. But I’ll repeat it for clarity. No problem! Any MoPar vehicle that is a R/T model, like the Durango, does NOT have R/T heads. Period. Never did the factory release a vehicle with these heads on the engine. These MoPar R/T heads are factor parts to be purchased over the counter . Ether at a MoPar desk (dealership) or through Jegs/Summit, etc…. I very much so highly doubt you’ll ever find these in a junkyard. But never say never! These heads are super hard to find. IMO, MoPar did t get the word out and, as well, they were a bit pricey vs the competition. Eat of luck on your hunt!!!! May you find a good set.

[@DrGo-bw2jy]

Thanks. You did make that very clear in the video… sorry that I got so excited about these head that I forgot that part. I should have watched that video twice so I can remember better. You guys indeed to a great job at being very clear and very educational. I just got way ahead of myself. I think I will attend that Mopar swap meet in Indianapolis in late winter/early spring and see if anyone there can help me find a pair. Last year I didn’t know these existed, so I didn’t look for them. Lots of big block Mopar stuff there for the big time gear heads!

[@rickyfulks889]

The prp is terrible on those heads

[@servediocylinderheads]

No kidding. Thanks