Bow Tie Overdrives low end 2004R is $866.

Langdon's adapter is $350.

Driveshaft costs, what, $350?

My mechanic says R&R of a transmission on my 56 would be four to five hours including crossmember re-location. What is unknown is how much other custom fabrication would be required to make the shifter and kickdown work properly. Thats where this swap becomes expensive.

If I found a good working 2004R used then the price would be less.

Anyone done this on a 235?