I can only tell you ported and fairly modded. With full 3" exhaust the Charger spools the HE351 in 4th gear right around 4100rpm @ 20psi pump 91 oct.
Through the open 4" dump it's full spool 39psi @ 3900rpm on Q16. Most I've heard of seem to be spooling about 500rpm slower, even on the 16v's. Not sure why........
How much HP are you making and how do you Know your .63 A/R stage 2 is done? Pressure tap?