Originally Posted by ap72
Of the cams you listed the xe274 is the best. If you insist on using that cam the Vortec heads would really bennefit from a good valve job and porting.[
A good valve job that includes 2.05 intakes, 1.6 exhausts, swept chambers and enlarged bowls
no. 1.94/1.6 valves. Using larger than that is just going to cost you, your peak flow is limited by the pushrod pinch in the runner, taking it all the way out will allow you to effectively run 2.02" valves but more than that is going in the wrong direction.