how do I remove/replace studs on 7 1/4

If you don't say anything about the left hand threads to the alignment shop,, they'll likely break them off, and have to replace them.. no charge..

They are sooo unusual, most don't realize the L threads exist..

On many customers vehicles,, I've placed a laminated,, Big Red Label, with - "STOP,, Left Hand Threads" inside the hubcaps, and a dab of red paint on the lugs...
LOL. That has crossed my mind. It all depends on who's working that day. There's a guy at my local Big O that knows about old cars and such. I pass his house every other day or so, and he's always got an old project in his yard. (not any mopars, though, so I might get lucky)