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Thanks for the responses. No heads with the short block I purchased. It did it have domed Arias pistons that I had machined down to run pump fuel. The plan for my 67 Chevelle is to install a Factory Muscle stick from Comp Cams w/ solid lifters, M21 w/ 3.55 posi. Thanks for the responses.

Hello, Any help appreciated in identifying a short block that I purchased a few months ago. Casting number - 3963512 T Stamp Pad - T0317 1W Cast Date - L 08 8 2 bolt main 6223 forged crank I have not been able to identify a 1W suffix. It is clearly a 1 as opposed to an L. Any help is...