Already have a properly setup torsion bar suspension with heavier bars, rebuilt front end, Addco 1-1/8" sway bar, and SSBC disc conversion. It could be better but it is decent.
You also mentioned Edelbrock shocks, but haven't mentioned what size torsion bars you're using.
With all do respect, here's what some of the guys are trying to tell you: What you call "properly set up" is considered a "very mild upgrade" for many folks around here. Unless your t-bars are at least 1" dia and you're using much better shocks and tires, you're not even close to the upper limits of A-body suspension. If you'd maxed everything out and then said "not good enough", I could understand. But the fact that you're not familiar with the Borgeson steering box tells me that you have some more investigation and research before I'd go with something as radical as you're proposing.
Having said that, if you proceed down this path anyway, I'd read everything you're willing to post about the swap, and wish you the best of luck!
