get a matched set of heads b4 you get a cam. get some 64cc heads, then worry about a cam. your cam profile should be matched to the engine's comp ratio, which I can only assume is 8.5:1 now, and is only good for a 260H cam or so. get the comp to 9.0-9.5:1 with some decent 64cc heads, and go for a 260H, you want a tire burner so you want low end, the hotter the cam, the more low end you loose. when in doubt, go light on the cam or leave it alone.