Questions on GMC inline 6.

Was wondering if anyone knows?
I am looking at buying an inline 6 out of a 56 GMC 3/4 ton truck. Was wondering what size it might be, if there are proformance parts, and how much it might be worth? I comes with the 4 speed trans.

 

More than likely it's a 292 if it's in a 3/4. But it could be a 250. Check Cilfford Performance for speed parts. This site will give you the spec's www.raceseek.com/chevy_six_cylinder.htm

 

check www.inliners.org for identification hints.

 

Cool! Thanks for the info.

 

I think '56 is too old for a 250/292 engine. They were still using Stovebolts in the cars in the early 60's, 250/292 came out in the mid 60's, unless GMC was using those sizes before the regular Chevys.

 

I was told it is original to the truck. I use to have a 59 el camino that had an original 235. So was thinking it might be around that size. Also it does not have the vent in the valve cover like the stove bolt that I had in my 53 chevy truck. Thanks!

Any one know what an inline 6 with tans that was running might be worth?

 

If it's a 56, it's probably a 270, unless it's out of a big truck. Doubt it's a 228 or 248, but possible. If it's out of a big truck, it'd be really big. The 250 didn't come out til the middle of the 60's, after the 194 and 230 were out.

inliners is a great site, and you can get some info off stovebolt.com

As far as worth, it's worth whatever ya wanna pay for it. I've gotten Stovebolts for $50, or $250, or free. It's up to you to decide what you wanna give for it. I'll say one thing though, they aren't getting any cheaper!

Good luck. Keep us posted.

jay

 

Opps, I read 56 but my mind switched it to 65. Old age, what can I say.

 

Patrics does a lot of stuff for the old GMC engine

 

It should be a small port 270 with a 3/8 belt width setup and the small 6 bolt flywheel, all good stuff to have. The first 3 digits in the serial # beside the dist should be the displacement. There are plenty of performance parts available, none are cheap. Remember nothing is like a Jimmy. Jay

 

I have a 1950 gmc 3/4 ton and the casting on the block says its a 228, and it came with the 3spd column shift

 

That 4-speed trans will be a Granny Gear 4 speed not worth hauling for use in a rod.

 

i think its a 270... dont hold me to it though

 

Wow,neat 'blast from the past'.

Not to be a schmo guys, but this thread's from '05.

Thanks for searching though (as I expect that's how it was found).