if you're into fabricating, why not adapt the long arm coil spring front suspension w/the rack & pinion stg. You'll get the disk brakes, and the handling & steering of the late models. I love the handling and road feel of my 09 Charger PP.
That's certainly an option. I upgraded the torsion bars to 340 bars, brakes to disc, and swapped out the manual steering box to new, tighter, one. (3 1/2 turns vs the stock, 4 1/2 turns I believe)