i just sold one of the older (1955-1964) Chevrolet three-speed-with-overdrive transmissions behind a 235 in a 1952 two-door--but, like you, the buyer wants to use it. i recently bought a complete Studebaker three-speed-with-overdrive for my 1949 pickup. These pieces usually become available when some otherwise sane individual chooses to replace a perfectly good inline drivetrain with some sort of "350-350" combination.
In looking for Saginaw overdrive parts i have had conversation recently with several Inliners who have the earlier Chevrolet overdrive. Surely someone in the States has a Borg-Warner overdrive assembly that they would sell and ship to you. Salvage yards specializing in GM and Studebaker parts would be among the places to inquire. An ad in the Inliner classifieds might yield what you want. Especially at your distance, you will want to assure that what you buy is complete.
God's Peace to you.
d
Inliner #1450
