sounds like you got a good setup planned for your motor.. just out of curiosity what is it going in?... anyways the gear combination with that tranny sounds good but yes you need a lower compression for supercharging applications like 8-8.5:1 i think is about as high as you would want to go...as far as the cam i have never had any personal experiences with a voodoo cam but have heard bad things my advice is to check out a company called Chet Herbert, they have cams that are specialized for supercharger applications and any other application you can think of if you pm me i can give you the phone number..... now heads is something that i am not real sure about for supercharging i would get several opinions on this, but if it was me either some smaller AFR or port the stock heads i would use stock heads mabee even GT-40s and port them.