differences in 727 transmissions

So i talked to the guy with the 74 van trans and he says it has the long tail housing so it should work for the car now i just have to wait for him to pull it so i can go pick it up. thanks to everyone for helping me with this learning experience, now onto picking out a good rebuild kit for it.
I don't know of any bad kits. None l know of have selective thrust washers so no kit l've seen is "complete" anyway. But check the endplay before you pop out the pump, and take out the front drums before you order parts. If you need another trans for some guts, it might have some good clutches and bands, unless you're going red eagle and kevlar.