Slant 3 speed trans?

I have 2 three trans out of 62 slant cars, one A body and other B body, they have the cover on the topside. They have no mount for a floor shift. I am wondering if they are worth keeping for any parts. I have a three speed side cover trans that will go in the 62 slant Lancer with floor shift. Will anything interchange? And what are the #'s for these trans?????