I have a 97 Fat Boy and have made the decision to enhance the performance more than pipes and the jetted stock carb, which I've already done. My struggle is what to do first, should I go with a combination of a new carb, cam and ignition? Or would I get a bigger bang for my dollar by replacing or milling the heads? I know eventually I'll do both, however, I'd like to do it in stages (a little easier on the wallet).