I recently bought a 92 gt.it is mostly stock.it has a gt-40 upper and lower intake.a 75mm throtle body w/ spacer.cold air intake.shorty headers,off roadx pipe and flowmasters .under drive pullies,racing clutch and 373 grs.and a custom tune chip.runs strong and sounds good.but i miss the looping cam sound from my old stang.my question is ,would it benefit me to change they cam when im running stock heads?i know heads would be a great improvement but are not in the budget right Now. Would a cam give me more hp? I was told it might actually lose hp with factory heads.