Made 529whp at 17psi...

Yocal ported/polished heads.
Stattama T67 .68 AR
ST5 cam and 130# springs (should have been 150#)
200k mile short block
Double Roller
FBody intake with L67 TB.
ZZP Plogs
e85

Hardly a "tune" on it, and 3 month old e85 in the tank.

Nothing to fancy needed to break 500whp.

Like everyone said its the transmission you gotta worry about.