For the PRO-TOURING scene, IMO, its more "artwork/design" rather than performance... and image rather than proven function.

I'd lean towards a B-body (any year) for comfort (front and rear seating room, trunk storage space, longer wheelbase, etc).

Properly modified stock suspension setups will almost always out-perform the expensive and radical non-stock setups (ie: coil springs, 4-links, etc).

Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!