Ford trannie
It must have been swapped in from a later model truck then.
Im thinking it would make a good trans for a low buck street rod, and with the OD, could run a real decent set of gears in the rear, like 4.11's, and would still come up with a 2.88 final in OD, which would make good for hiway running. Does that trans have the capability of changing the ratios on low and second, to make them a little closer ratiod? Most conventional Ford 3 speeds Ive run into had a 3.18 low and 1.75 or there abouts second gear.
I am thinking with a 4.11 rear a low gear of around 2.80-2.90 would work great, especially in a light car.