You could always put a set of casters under the rear bumper like they did for a short time back in the 70's . But like Dave said, If your makin' enough power to need wheelie bars your problee' exceeding the limits of an IRS. Probably why wheelie bars for a jag rear end and or Corvette IRS are not to be found. Being a lightweight vehicle might allow it to survive a little longer, but 600+ ponies is a hand full for a light duty rear end.