Barney,
I'm converting my '55 with 235 & 3-speed to an O.D. trans. The one that I found still needed the harness, kickdown switch, O.D. relay, and the T-handle cable for O.D. lockout.
Original kickdown switches are really hard to find. I bought one on eBay for a Studebaker, which appears to be electrically identical to the original (per the schematic), but uses screw terminals. The seller has another one posted:
eBay link. The bracket for the kickdown switch has been impossible for me to find for a 235, so I'll make something to fit. I'm not worried about showing the car, and this won't be a glaring modification.
I got the O.D. wiring harness (for 235) from Danchuk (their P/N 1583).
mrnomad.com has new O.D. relays here: (
Mr. Nomad link).
The O.D. lockout cable with the T-handle came from eastcoastchevy.com. You'll have to search their online catalog to find it. It's not a reproduction, just a functional replacement. The T-Handle does not have the word "OVERDRIVE" stamped across its face. It does, however, have "China" cast into its underside.
I hope this helps some. Not all perfect solutions, but should get the trans working. I can't wait to try mine out!
Good luck,
Joe