Excellent! Thank you sir!

Thanks Greg! Appreciate it.

Thank you. There will be some old forgotten hot rod tricks going into it when we get to that point.

Awesome! I've designed forged pistons already and have them in production now. Will be fabricating 3 independent intakes for side draft carbs, exhaust manifolds, etc. Most likely, will run an HEI distributor and do a bunch of trick machining to heads and block. If you're interested, I could always do 2 sets of everything. Thanks for subscribing.

Hey Ralph. Thanks for the comment. I'm always up for learning something new....I dont recall seeing an early Chevy I6, like a 235, with anything other than a 1 piece rocker shaft. Of course there seems to be some oddities out there that have left me scratching my head. I've seen some production things that many say never happened. Maybe you can help me with this. As you know, the GMC head, all valves are in line. Ive seen some chevy heads that are the same, but others with a intake valve with a 5 degree angle and a slight variance in both the "sheetmetal" and cast rocker arms. I'll admit I am no absolute authority on the I6 variations thru the years and have seen some weird stuff. I'm open to what you know sir if you dont mind sharing.

@@KevinBaxter Kevin I mean no disrespect but you've obviously never had the rocker arms off of 216 235 261 motor the oiler is in the center on the rocker arm shaft and both shafts stick in either end of a short piece of looking pipe where is the Jimmy has a continuous one piece shaft all the way through when you unbolt the rocker arms on the Chevrolet motor the rocker arm shaft are in two different pieces front and back shafts Chevrolet I had at least three or four different ways of getting oil up to the rocker shafts where is GMC use the front galley going up to the front of the head all the way from start to finish sorry but I don't have more time to go into detail but I would love to continue this later thanks Ralph

Ralph, absolutely NO disrespect taken at all sir. I appreciate your candor. I actually took a few days to look back at photos of engines I've built in the past...took me forever to find them. It has been nearly a decade since i built an inline chevy and hundreds of various engine builds since that time. I've done other inlines since that were GMC, not Chevy, as my memory led me to believe. It's hard to remember every detail of every engine you've built having done so many. But...as you know, you are correct and exactly as you describe. Thanks for refreshing my memory...that's why i love KZfaq...we can all learn from each other. I know I've learned a few things from my viewers as well.

Me too. Getting anxious to get further into it...but have a ton of bike work to get done. So during biz hours, back to that

You're welcome. Thanks for watching and glad its helping.

That's awesome. Would love to see some of those badass rides!

Thanks Edward. You are absolutely correct, and I'm aware. I chose to use the nomenclature so that anyone rebuilding a GMC or Chevy "Stovebolt" I6 would be able to find the video. As i state in the video, while the two engines only share a rocker shaft in common, everything else is different. But the process to rebuild one is nearly the same. I felt both GMC and Chevy owners would benefit from the information.

Excellent. Sounds like a good build. Stock cam? Compression bump? Any head work? Curious to know more. Thanks for following. That full filtration bypass mod is a great thing to do for sure. Good on ya sir.

Full flow is GREAT to have on the GMC ENGINE

Many thanks!

There are several options there....but may require a custom adapter or bell housing. Speedway Motors, TCI, etc may have some options. A Powerglide (2 spd) could be a good option depending on rear end ratio. Pretty hard to beat a TH350 though or a 700R4 if you have a very low rear end and need overdrive.

The 57 GMC did not have a V6, it had an inline 6.

Repeated soak the cylinders with PB Blaster. tap lightly. repeat. maybe a little heat with a propane torch will help. best of luck

That number isn't jiving too well from my memory. Check the numbers next to the distributor and the casting number on the left hand side of the block just above the oil pan flange. Should be a 6 or 7 digit number if i recall correctly.

@@KevinBaxter 6107328 on the left side. It's a 248. Thanks! Didn't know that number was there. The first one I gave you was from behind the distributor.

Thats the number I was looking for...but you got it decoded. Good deal.

Nice catch man! It was out of its bore because when I pulled the pushrods out, it stuck to it. I knew it was out.

Kevin Baxter, Oh ok 😄👍🏻

No duh...lol....I have a matching set of those exact Carter YH carbs you are referring to, sitting on my workbench for this engine. Actually i have 4....one is a parts carb just in case.

Interesting....i appreciate the comment, but there is much out there in the contrary. While 1960-1962 can be debated (military special use, etc), the 302 was certainly made up until 1959. I can even buy gaskets from ecklers for 51 to 59 model 302, www.ecklerstrucks.com/gmc-truck-engine-gasket-set-302-ci-1951-1959.html or piston rings from 52-59 www.performancenowdirect.com/piston-ring-set-1952-59-gmc-truck-6-cyl-302/ Also found this great article on Jim Carters website from a customer retro fitting a "1959-1962" 302 into his Chevy truck. As a side note...the engine in the video, is the first I have....the second...came out of a 1959 military truck. It has the proper engine code, casting number, head casting number, indicating it as a 1959 302. Where did you find information saying that the 302 was only made until 1955? And why would all these companies list parts up to 1959 if the engine didn't exist during those years? I would love to see data....because A LOT of people would be wrong on this one. Thanks!

Here's the article. From just a quick search anyway. www.oldchevytrucks.com/Articles/GMC-302-Install-in-1950-Chevrolet.php

Oh...one last reference. The following is just one place, after many cross references, GM sources, and Service Manuals, etc (in other words, this isnt the only place this information exists)....That show block casting numbers for the 55-62 as well as no year models listed for military specific use. www.hotrodreference.com/919/gmc-six-cylinder-casting-numbers/

Unfortunately, your comment indicates you are the one who doesn't know what he's talking about. GMC did, in fact, keep the 302 thru 59. The Olds 324 was a V8, replaced by another Olds sourced engine, the 370 V8. If you have decent vision, you should be able to see that the engine in the video is a 6 cylinder, not a V8.

My 1960 GM truck shop manual still has a section for the 302 six cylinder. I also know that the 270 GMC engine was used up to 1962 in GMC TGH3102 city buses.