[Mongoose930]

On my first Contemporary Cobra with a very streetable 428, I had a TKO 3550 with .68 5th gear and a 3.54 diff. I would absolutely not do this combination again as the car just lugged in 5th gear. I have a 482 in my Hi-Tech and went with the TKO600 with the .82 5th gear ratio. I haven't driven it yet so I can't tell how that combination would work but I drove with the .68 for 2 years and would not do that again. Sounds like a great project - you need to share pictures as soon as possible.