What Im thinking is if you at least go a vernier gear, j3 + exhaust/induction you'll have the foundations for future mods and it will leave money for springs and/or brakes. Once you have some more cash and get the head done and cam you'll have the vernier gear to dial into the cam and also the j3 to tune it all already. If there is cash left for diff ratio then with the above mods you should have enough of a power increase to keep you amused until your cashed up already.