Who makes the best 5 speed conversion transmissions for C3's, more specific 1972 Corvette?

Thanks

I bought the kit from Keisler and is a bolt on deal. I doubt Classic5spd is much different.
Do not believe the salesguys, you will not do this conversion in 2 days. The pedal conversion is the most difficult part, there's not much room. You will have to align the bellhousing, you need offset dowel pins and a dial indicator to do this.
You have to inventory the parts when you get the kit, many parts were missing but all it took was one email and they sent the part (at no charge)... this can be very annoying if you miss a part on a Saturday afternoon.

I bought mine from Keisler also. It has been almost 5 years ago with mine and would consider it one of my best mods to the car. It really makes a big difference in drive ability of the car.