72 Rallye Suspension Upgrade

[72Charger72]

I am restoring a 72 Rallye thinking about how bad they handled in the day and the fact that this is a frame up restore. It probably is the best time to upgrade the suspension. This wont be a track car and my budget is not huge.I have all the control arms and suspsension from a 71 72 and 73 Charger.
After doing some reading up here http://www.cuda-challenger.com/cc/index.php?topic=95660.0

Im thinking a stock upgrade and new Borgeson stearing box might do the trick. Bermanautocraft.com has some pretty good prices. Anyone use there parts yets?
Looking for recommendations? Steering was always sloppy in these. and the old leaf springs are worn out.
Also it will have a 440. I should mention on the older 71 parts I did have it converted to Disk on front.
Thanks!