Sounds like one hell of a combo.
The only thing I would think about changing is that 6A box to a 6AL.
The rev limiter will give you peace of mind not to over rev and chance blowing all that $$$ up.
Your combo is very similar to my lil 355 which puts out over 460hp and 480 on tq.
I just changed from Holley carb to a Demon and my engine LOVES it!!!! and so do I...lol
Keep us informed on the progress!!!