I have a 87 IROC with about 400hp. I have had the frame tied for many years. I still got some flix on the right side. i just install a STB and can tell a big difference. When you break into the 11.99 et you will have to have a cage.

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87 IROC L98 700R4 A few mods. Best et 12.96 at 110 mph
All motor No NOS or Supercharger.
96 WS6 FORMULA Best et 13.5 at 105 mph