OD trans

Steve, We installed a similar trans from Passon Performance in a 73 'Cuda.
451 Big block with 3.73 rear. Drove it on the Hot Rod power tour. It was a world of difference that made cruzin comfortable.
We looked at 5 speeds and 6 speeds. The conclusion was the 4 speed OD that was less then half the cost was our best option, and has served the owner well in the past 15 years the car has been on the road.