Thanks for the replies, guys, but I don't think you understand what I want...
I know it won't be easy... expensive and troublesome is more like it.
But my problem is finding one! Can anyone give me some clues on how to locate the things?
I understood that they're in Chevys to about '65 as mentioned by don 1450. But we didn't get them here, none of them. Even if I have to buy the complete transmissions, I'm prepared to chase them up. I don't have access to junkyards that might have them in, and they really shouldn't be expensive as they're 'old technology' and few today would understand them.
Any possibilities?