Everything is available. Either on Ebay or from a salvage yard.
I have a 55 2nd with the 235 and purchased the OD transmission. I only got the transmission.
I wanted to stay original so I searched and found all the other parts.
At present the solinoid, governor, and the kickdown switch are listed on Ebay. The relay switch and the disengaging cable show up periodically.
You can purchase the wiring harness from some of the popular venders.
The hard parts to find are the bracket for the kickdown switch and the accellorator linkage with the paddle - for the kickdown switch. You can find these with a lot of searching or construct your own.
There are other ways to rig the OD transmission to make it work. Search this site and the internet and you will find them.
Best of luck.
