Just got onto your post. Read your specs on engine and hoping that your rod specs are a misprint. Assuming first that they are steel rods, but 5/16" rod bolts? Misprint??? Okay now of all the reply's on here. My advice, listen to w5dart66, Brett Miller. If you can't take your motor to him, talk to him. And my opinion, the converter stall you have would be okay for a big block. Several replies are correct, you need about 6000 stall. And the RPM you need to turn you need lighter internals. Such as Bill Miller aluminum rods, more compression, consult Icon pistons. They have made several pistons for sb W9's. Oh and one very large issue is you cars weight. If you can get 3 to 4 hundred pounds off you would be amazed at the difference. Good luck to you and before you spend a lot of money be very certain of the advice you take.