I have a 2001 heat and we are puting a 496 (454 rebuilt to 496 all custom) that should be running close to 600hp. Can run motor up to 6000 rpm if needed any suggestion on prop, pitch.

i would try a stock 28p Bravo I 4 blade w/ a 1" spacer in the drive

that was about perfect for me and i have around 600-650 HP

later i tried a 4 blade merc labbed 30p which got me 2 more MPH

-Ned