You're going to run into a lot of problems and wasted money trying to find out if parts from another tranny work or not. I've done it all and all of the reasearch you can do.
Problems:
Some synchros are the same, but then they have a smaller inside shaft diameter and wont slide onto the SHO shaft. Then you have some that have smaller grooves for the shifting forks, meaning the SHO one is too big to fit in it and operate the synchro. You also have some that have super tiny blocking rings that wouldn't work on our bigger gears that require bigger blocking rings.
I've spent plenty of time inspecting and testing parts in this department, as I have over hundreds of parts to go through and test in a warehouse. Some parts from other Ford vehicles come closer than the cars brought up in this thread, but I still haven't found a part that would work and be plenty of. If you find one, most likely that same parts is going to be obsolete already and hard to come by. Then if there's an aftermarket source, you're going to be buying a whole rebuild kit just to get one or two blocking rings.
There's a lot of things that would make parts from other cars not work, even though they look the same. And, you can bet that there's not one dealership or warehouse that's going to let you dig around in their inventory to see if something will work with your transmission.
not quite 23's but close
