The whole overdrive cable discussion is over rated. Get one that works, leave it in overdrive, and drive it. I installed an OD in my 56 shortly after I purchased it in 96. I have yet to have an occasion to take it out of overdrive. You could wire the lever in position and accomplish the same result. Buy one of the Ford cables and move on.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine