Re: Big Block Blueprinting and Edelbrock Top End Kit
If you already have the block and pistons, I see no need to start over.
Chris provided some great advice.
I am assuming the pistons are new, not used. First question: are they really vintage TRW forged pistons? If so, you need quite a bit of clearance because those expand quite a bit. There is a modern version going under the same part number, made by speed pro. They are a completely different alloy which does not expand as much and therefore does not required the same clearance.
I believe the clearance on the vintage trw piston is .005. Pretty high by today's standards.
Also assuming the final hone was done with deck plates to get the proper clearance AS SUGGESTED BY THE PISTON MANUFACTURER. That is where to start for blue printing. Second, make sure to get the quench down at least to .040, which is living on the edge, I admit.
Third, buy rings that will require filing to fit exactly as recommended by the manufacturer.
If I am wrong, and the pistons are vintage AND used, measure CAREFULLY. Old TRW pistons can take a lot of abuse, but run hot and the skirts can collapse.
Follow Chris' guidelines and rec on a camshaft and you can make 500 horses easily with a 396.