My rear gears are like 2.73 is it? Maybe that is 2.72 I can't remember. So the gears will be the only thing keeping me from getting bottom end really but that is ok since I will be driving this thing on the highway a lot too. The 66 is my truck for the get up and go driving on the weekends now. heh. I will check that cam out. I may go ahead and see what my dad thinks about getting the whole performer kit from Edelbrock with the cam, manifold, carb and everything else besides the heads and keep the stock one's on for now.