[Oldbluoval]

When putting the doors on, how is the gap? You are working on its chassis frame with body bolts thru wood to frame?
I’ve built one of those years ago.
I’d put the doors on and the rear “Skelton” and see where things go from there
Seems if the sills are correct the remainder should fall in line
Your original sills were “original” and not Messed with.