Big Block Suspension Question

I figure if Hotchkis can make a 4 door Satellite faster than an (admittedly stock) BMW on a Track (with the guy that drives that BMW on that track to test tires) then the Torsion Bar suspension can't be all that bad.
That said, of course there's the header clearance, weight, & easier? tuneability differences.
I'm shooting for the look of surprise when I whip up on some corners then tell somebody its 1968 Mopar suspension technology.