Yep, followed Keith's advice then went with Ram's aluminum flywheel and clutch setup as I'd mentioned. Never a hint of slip, the grab is very predictable and the pedal pressure doesn't give me a hernia. Zero problems with the combo.
Flywheel:
With heavy cars a good deal of inertia is required to get it moving (out of the hole). A heavy cast iron flywheel aids in this. Our light cars doesn't need that so an aluminum flywheel helps restore some of the "snap" (quick rev) that our stroked FEs are deficient in.
As Stentor hinted at, your Billboards (Goodyear RACE tires) are going to aid in the axle twist process. Ignoring it saying that my car is light won't stop it from happening. Did I mention that my car's never been raced, never ran slicks and the axle twist came from 100% street use?? LS' 28 spline Currie Ford 9" axles aren't even considered a performance axle. Currie is a main stream crate rearend mfr and typically isn't considered "race quality" by the pros.
The TR3550 is rated at 350 lbft. almost half of what you'll be putting out. The Billboards will aid in it's demise too. I did Keith's 482 w/ the lakewood and TKO 600 at the same time. I should have done the axles and diff at that time too. You'll be tearing things apart twice or three times if you don't. I'll probably be reading your "What axle?, what diff?, what tranny? threads in several months anyway. I'll look forward to an "I told you so!" or two..
Dave