6" wheels at the front, 7" wheels on the rear, redline tires; I don't think the owner is interested in 'good' handling that much, so anything bigger than 1" probably won't be chosen anyway.

I've got 1" torsion bars on my '73 Dart, upgraded from 0.870 bars.
But wouldn't be opposed to upsize even further to 1.06 or more.
I believe 1" bars should've been standard on A-bodies to begin with.

(A-body bars are shorter than B-body, so they are firmer than 1" B-body bars)