[Aussie Mike]

Hi All,

I've always been keen on doing unconventional things and I'm doing as much of the Cobra build myself as possible.

I'm toying with the idea of using a Toyota Supra Turbo gearbox behind the Gen 3 LS1 Chev. From what I heard from people involved with the Toyota Supra, these boxes can handle some big HP (600HP twin turbo etc).

I plan on using a lakewood or similar steel scatter shield and adapting it to suit the box. This won't be too hard, just machine up an adaptor plate and weld it in place. The 12" clutch plate on the Gen3 presents a more difficult task (different spline and larger diameter disk). I'm contemplating punching out the rivets on the center of a Toyota clutch plate and then making a solid center 12" disk to rivet it into. I would then re use the Chev facings on it or get new ones to suit. I can machine a new pilot bush out of some phosphor bronze or make a roller bearing pilot. The release bearing would probably just need a sleeve.

The Supra Turbo boxes (when you can find them) go for around the A$1500 mark for a good S/H unit (a new Tremec down here is around A$4000).

Has any one had any experience with these Gear boxes?
What do you think?
Am I insane?

Cheers