Re: engine assembly code
 

OK, what you're saying is that it just doesn't come on trucks? Don't flame me, I'm just trying to clarify.

Re: engine assembly code
 

I am just saying the info you already have is just about all the info you are going to get. There is not a for sure 100% guarentee way to tell if a 67-72 chevy truck has the original engine or not because THERE IS NO VIN # ANYWHERE ON A TRUCK MOTOR.

Re: engine assembly code
 

:agree: x2

Re: engine assembly code
 

I got it, I was simply trying to clarify. No need to shout, man.

Re: engine assembly code
 

I did not mean to shout.:lol: I was just trying to get to the point that Stope and Clay and others made earlier in the thread.

Re: engine assembly code
 

Thanks for the info, I'm satisfied this is the original motor.

Dan

:gmc2:

Re: engine assembly code
 

I was going to say that I would be very confident that your engine is the original one. Too many things line up for it not to be.

Re: engine assembly code
 

This truck was a nice find. I've been dreaming about one of these since I was a kid.

Re: engine assembly code
 

FYI,

My 72 engine code is T1221TLM and my truck was assembled January 5, 1972 (from Build-Sheet). The "T" stands for Tonowanda, the 1221 stands for December (12), 21st (21) and the TLM is the correct code for a 72 402 with A/T and smog pump. By the way, my Protect-o-plate has the T1221TLM stamped in it. That's as close as you get to "Numbers-Matching" in these trucks.

Did your look for the Protect-o-plate?

Re: engine assembly code
 

You would need the protect-o-plate that came with the truck to determine that.

Chevrolet protect-o-plates have the engine number stamped on the POP to match the engine. But it seems that GMC would just say the engine size like "400" for a 396/400/402 and not have the stamped engine number on it on the POP. So even if you had the POP for it, it wouldn't have the engine number on it. This is all from memory so it may not be 100% correct.

Re: engine assembly code
 

Having 30 year of re building engine for the corvette guys I would say that is not a re-stamped block. Normally the broaching marks after decking a block (only 2 reasons to are to confirm center of crank to deck height or to lose original stamping) are circular. your broach marks are straight. To me that original.
Good luck with what every you do.

Re: engine assembly code
 

Old post, would someone know what the kx is for T0927TKX

Re: engine assembly code
 

TKX 1972 Truck 402CID 210NHP TH400 L-47 Series 20, 30

T- Tonawanda engine assembly plant
09=September
27=day

Re: engine assembly code
 

What letters make it a72.?

Re: engine assembly code
 

The TKX code is a 1972 model year code assembled 9/27/71.

Re: engine assembly code
 

Thanx, just trying to get a manufacture date for a valve cover decal that is being reproduced on here