Yes, that bore size is right. I don't have a Sealed Power/Speed-Pro catalog handy at the moment but several manufacturers make a H-E piston. They're much stronger than regular cast pistons, but they're about half the price of forged ones. The other advantage is an almost zero heat expansion rate which means they can be fitted to a much closer skirt clearance than forged pistons. Forged pistons need .004" or more clearance, and they're noisy. A hypereutuctic piston can be fitted to .0015-.002 clearance and run hard without tightening up in the bore. I have built 400+ HP engines and run them hard on circle tracks with no problems, using that type of piston.

Edit:
KB makes good pistons, but they're a little spendy. Keep shopping for Sealed Power or Speed Pro, but KB is OK if the others are hard to find.
Jerry


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