mark i can get 10.1/2 with stock pistons. ive got a 327 crank. i also have almost everything to build a 350 13.1. but that aint the goal. im going to take this 307 and blow people off the street. bak in the late 70s people told me i couldnt get my 55 with its 327 to run in the 11s. my best time was 10.92.that was fast for the 70s street car.i did it. now im going to take this 307 and do the same thing. ive got a buddy who has a 292 chevy (283 bored) that is nothing but bad.i can go faster but not for the money. the car im building is being built to 63-64 nhra rules. gasser rules. and there werent no 350s around then..but there were some fast 292s and 327s.seen many of them worked over 283s shut down 409s and 348s....god i miss the old days.so im gonig back to them and i aint comin back...lol trying to get one built before the 2013 hamb drags.well thats the goal anyway...