Ray:
The only ones that I have been able to find are in the hands of retailers and they are asking $1200 to $1600 complete. I have three B-W overdrives for Chevrolets which I have bought at swap meets over the years. Ones needs new bearings in the front gearbox and on one the overdrive engages and disengages by its self. One is in my 55 Chev pick up and .70% overdrive is to high with the 3.9:1 rear and P 235 75 15 tires. My 48 Plymouth has a 90 Dakota rear end installed in it with 3.55:1 gears so the .70% overdrive might be too high for it. To buy and install from a retailer with shipping would be about one third the resale value of the car. My car is a Special Delux 4 door sedan and "Old Car Price" book lists a #4 car at $3080. Now I have had this car for 20 years and love it but it still needs new rubber all around and glass plus upholstery and paint. Now that same car as a #2 is valued just a little over $6500. I cannot do the things to make it a #2 car for $3500.