A833 Tail shaft

OD are sort of like skipping a gear between shifts. You will need plenty of torque for any performance. Here is what I think where the difference in opinion comes in. If you live in a flat state you may like the OD trans. But here in the hills of Pa. those OD transmissions really suck.
I put a OD in a 440 B-body that I took from a truck. It lasted about 45 minutes before it sounded like marbles in a tin can after some hard gear changes. I do not believe they were built for abuse of a performance engine. If you want to granny your car around to cruise meets or shows I would say good choice for economy. But that defeats the purpose of driving a old performance car for the feel of what they were.

It would be like taking a turbo 400 trans and 390 gears out of your GTO and installing a power glide and 308 gears. Just doesn't make sense to me.