Choosing pistons

96 Magnum block half filled
MRL 408 stroker kit
CSU blow through carb
Eddy RPM heads ported all to hell
Paxton Novi 2000
Procharger intercooler and spraying meth
SB 727 built to handle 1000hp with reverse manual valve
Aluminum driveshaft
8.75 489 case with 3.23 gear

I just learned a hard leason with valve springs. GO HEAVY with boost and make sure your lifters can handle it. Pulling timing with a Mallory 685. Wideband is a must and add a knock sensor if you can.
Power?