What about the same combo but with dart Iron eagal heads or the upgraded sdpc vortec heads. Anyone use them or have anything good or bad to say. Right now it is looking like i am going with the sportman 2 ot maybe the dart or vortec I cant make my mind up because I keep reading a bunch of different kind of setups on 355's. I can not jusifiy the price of an aluminum head when they flow the same as the cast iron ones on the aftermarket. Another thing do you all run angle or stright plugs whats the difference in them. Sorry for all the questions i am new to this motor build stuff