Mike, If you are after a recommendation get on Facebook and find Nick Smithberg from Smithberg racing. This guy is a genius on early hemi's (I bet he knows polys too) he competed in the Engine Masters with Gene Adams team and is real sharp. He stunned everyone this past year with a variable length intake runner system on a early hemi that adjusted while the motor was on the dyno! He is very willing to help also, and strangely he is a young guy who loves the early stuff. I am going roller on my 392 build but it has .525 lift, thus the reason for the roller rockers, knocking out being a "economical choice".