What transaxle are you using? If you have an Audi box, even with Quife or 944 parts, you should keep the horsepower down under 375. You will need at least a G50 if you add more. I believe M-6007-Z50E is your best bet. 360 should be plenty for the street, but you may find yourself wanting more later. Have you talked to Fran about which engine and parts would be good to use?
--Mike / Turn Ten Racing, Inc.