Some great info, I use a heavy spring but not too heavy, its still speced for a hydro roller.

Ive read about concerns of the roller lifter weight but also consider 6 6200 needing alot less then other builds with solids or s rollers going 7500 plus.

Im using the 4494467 PN tappet package from mopar that had a lifter and pushrod in each package. These were dated 88. Of course I set aside the pushrods because they are thin with the oem spring and crazy approx .450 lift oem roller cam makes me ask why they even did it when other brands hydro lifter motors seemed to pick up alot more the the mopars did.

Its talked about here

http://ramchargercentral.com/vehicle-help/5-2-magnum-high-oil-pressure/

My build seems pretty peppy but I wont know numbers till spring and I wont go out on the roads yet with the mag/salt residue on them.

Im using a 6cc domed piston to offset the 3400 ft elevation im at.