Help identifying my LS6!

[VIIX]

I just registered with your forum because I am a huge Yenko fan and also need help identifying an engine block that I just purchased and am rebuilding. I purchased a complete LS6 engine (minus the carb) from a customer that I have known for over 20 years who is a fanatic about originality and authenticity with his old Chevys. He has had the engine for well over 20 years and he knew the fella very well that he bought the engine off of. As my customer has gotten older he hasn't been able to remember the exact details of the origin of this engine - only that the guy he got it from last had it in a street rod in the 80's. My dilemma is that the date code for the 512 block is D 7 71 the 291 heads are L 2 70 and B 5 71. The suffix on the engine is CRR with other numerical stampings that I did not write down. In all of the publications that I read, the CRR is only designated with a '70 Chevelle with an automatic. I have been told by guys that were around in the 70's (I was born in '76) and worked in the dealerships that GM never stamped an over the counter LS6. Any help and direction would be greatly appreciated.
Back in 1995 there was an ad in Hemmings for a real 69 Yenko Chevelle that need to be restored, but complete. I talked to the guy and he would have sold it for $15k. I just couldn't seem to justify the purchase being so young at the time. If I could only go back!

[SuperNovaSS]

Most likely came out of a boat originally. Boats had the CRR code even in 71 and 72.


Jason

[Fast67VelleN2O]

They stamped over the counter LS6 crate motors early on with LS6 codes. I have seen a few.

[VIIX]

So they would have stamped the CRR and the VIN number on the block?

[Fast67VelleN2O]

You have a vin number stamped into the block? Where is the vin located and could we see a picture please?

-Matt

[VIIX]

I may be wrong in assuming they are ID numbers. There are definitely extra numbers next to the CRR. I will get to the machine shop as soon as I get a chance and take a pic and get it posted. Thanks for all the help guys.

[SuperNovaSS]

Do the numbers start with GME?


Jason

[VIIX]

I called the machine shop and he told me that the letter/numbers before the CRR are T0501.

[Mr70]

Thats it's assembly date,when it was deemed a capable running engine.
T=Tonawanda engine plant.
05=May
01=1st day

Seeing as the block was cast in April '71,sounds like it was one of the over the parts counter available engines during 1971.

[VIIX]

That seems to make the most sense. Thanks for all the good info guys.


Anyone have any idea what this might be worth when it is done? I'm putting it back as stock as possible.