I have just purchased a 396 Engine actually Block, Heads, Crank, Rods, and a set of new Speed Pro Pistons came with this deal. The motor has all of the machine work done and new cam bearings installed. Block came bored .040 and the Speed Pro's are .040 as well. The feller I bought this from is a guy right here on CHR. He had the machine work done some time ago ( 2 years I believe) When he had the block done he did not have the pistons at that time, seems this always has a bad ending and this time is going to be no different. The .040 Bore job should have been ( If my math is correct) 4.134 as the stock bore on a 396 is 4.094. Well I had the block miked today and it turned out to be 4.140, the Speed Pro's are L2240NF which turn out to be a forged piston. I was a might worried about the .006 clearance in the block so I called Speed Pro and they tell me that Piston Clearence should be .0015 on this piston. Man that seems awful small for a forged piston, but Speed Pro insists this is the correct #, and it is stated on the piston box as well.

So it looks like I am hosed on this set of pistons. So the question I have is ---Can I buy a set of pistons to fit my bores at 4.140. I have searched and searched the net for any and keep coming up empty. These piston websites have very little information about any thing like this. Anyone know if I can and two from whom?

(I can always have the block bored to .060 but if at all possible I would like to leave a little room for down the road.

Thanks Roland