Re: '73 Chrysler Sport Satellite
ditto that.
Yes you'll have to take the cap off, or cut the splashwell off. Mine's just like yours and I just chopped the whole splashwell off of it, and will just have to join the 2 pieces back together later when done. When you put the new transom in, you can just use full size pieces of plywood, instead of cutting it up like they originally did. Much easier and stronger that way.
ditto that.