Well, your options are to keep it like your machine shop guy planned with about 250 HP or go with stock compression. Stock compression(around 10.5 to 1) would make it so your have to burn a mixture of 92/93 and 110 octane racing fuel. It would also give you another 75-100 HP. This is all very general to keep it simple to make your decision easier. Once you make the decision to go with the higher compression you will ALWAYS have to use high octane.
