You'll probably need the 1310/1350 conversion joint, depending on the pinion yoke on the Ford 9".
Spicer makes the majority of those joints, so I've been told. (of course, made overseas or across the border to Spicer specs).
Best no-fail bet is to load everything up and take it to a driveshaft shop, they can usually eyeball things and make a match.
OR, you can take some inside measurements of the bearing cup distances on the ford yoke, as well as the inside width of those bearing cups and try to match something up. this is what I did and it worked out good. I also measured the u-bolt hole distances and was able to make a match.
Sorry, I dont have those part numbers anymore, I looked but was unable to find them.