Modified T-56 Magnum questions?

[Yenko boy]

So i have been doing transmission research lately for my ongoing project 69 camaro. This car is being built for performance but im also still trying to keep decent street manners. So Im looking at a modified magnums from Rockland Standard Gear specifically there magnum with ZR1 1-6 But different final drive(3.90) was wondering what you guys thought about this setup? Engine is a BBC 427 600+hp 580ft lbs and 7000 rpm redline. Link below has my wheel,tire size, and gearing info included. Im a newb to transmissions and gearing setups so my ears are open thx all.

http://www.teammfactory.com/gearcalc...f=&trannytype=