I was where you are now a few years ago, I went with the 4.5 stroke crank, and got a killer deal on a set of the MP 9.5 to 1 pistons, I wish I had more compression now, there is a set of 12 to 1 MP pistons on ebay now. I started with stock rockers, went with StageV rollers, hydraulic roller does not work easy in a Hemi, the lifters are too tall. I went with a mech. roller with pushrod oiling. Those new heads that flow like 400 out of the box seem like the ticket. I would love to have those heads and fuel injection....Tim