In the 70's I built a Saginaw 4-speed overdrive by putting the OD from a Saginaw 3-speed on the 4-speed. This was a long time ago and I don't remember a lot of the details.

I recall that making the floor shift linkage work right was one of the bigger challenges.

If I were doing it today, I'd look for the cable based shifter from something like a Citation. I don't know how available those are today, but when I parted one out years ago I was impressed by that shifter.

In reality if I wanted an OD manual in a Stovebolt I'd do a T-5 conversion.


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...