cam/carb/exhaust will obviously help, but it isn't going to do that much if you don't put decent flowing heads on there that flow much better than stock at .500", thats really where its at as can be seen by the figures I posted above (increase of 50ish hp) and as the dyno results show previously. Be interesting to see how much more power that 7.8:1 motor would've made with heads that flowed in the 280's at .500.