Crazy idea

Check out Toyota Supra rear suspensions and drives; they are mounted in their own subframe. Dunno what HP you plan but they can take somewhere in the 300-400 HP range in the Mk IV generation with no problems. These come in 4 generations, I believe, with the latter 2 being the more desirable and the Mk IV rated for the highest HP levels: an earlier, more compact swing arm type was earlier, and a double control arm later type came in the '86 and later MkIII and MkIV Supra's; the later uppper control arms are AL to save weight. You can get lots of gear ratios for the rear diffs. Not sure what the total wheel travel is on this suspension; upgraded rear anti-sway bars are available..... There is a www.celicasupra.com forums where you can learn far more than I could ever tell you.