Autocrossing A Bodies
Yes, my son has autocrossed his 67. Most of the time it was with .990 torsion bars and front/rear sway bars, KYB shocks, and home-built rear springs. He now has 1.14" torsion bars, but had very little race time before a spun rod bearing grounded the car.
The brakes were stock small bolt a-body (K-H discs, 10x1-3/4 drums), but now it has stock 73-ish discs and 11x2.5 rear drums. Race wheels are Paulsen 15x10's with used Nascar slicks.