I have an offer on a Borg-Warner R10H-1A 3 speed OD out of a 1959 Bel Air. He said that the previous owner said that everything worked when he bought the car. I was wondering if it would mate up with the bellhousing on my 250 with the standard 3-spd. What other modifications would I have to do with the conversion besides shortening the driveshaft, wiring everything together and mounting the pull-out cable in the cab?