Mostly because it's all I can do with it. Not much left in the head, and I don't like caring for high rpm motors. The deck is + .5 and I'll run a ,125 gasket keeping the skirts in the bore. The torque will go up and the heads on this next one are better by more the 40cfm in the mids so it should still help going bigger. Also I'm going to have 2 direct port kits on it and maybe plates for the third system. I'm thinking what it can't draw na, I can ram down it with spray.

I would be very happy to hear from you what type systems would be most effective on this one, if you don't mind.