What mods for my 904 when using the BPE 408?

rumblefish360 said
What flex plate should be used? Neutral or weighted?
Thanks

BPE strokers use 360 weighted flywheels/flexplates and magnum weighted balancers (which are different from 360!).

Details are listed on the shortblock page under rotating assembly:
Mopar 408CI Stroker Crate Engine | Small Block Chrysler | Shortblock