I would add that whatever you decide remember these transmissions are as much 55 years old with the newest ones being about 35 years old.

There is no telling how many miles are on whatever you buy. Do not be afraid to buy new billet hubs, bolt in sprags, and such just for the piece of mind.

Even if you are not going to build a 1500 HP monster motor it may save you from a breakdown.

My twocents