Originally Posted by unworthy1

that poor thing needs oxalic acid bathing STAT! And rather than strip and repaint (tho obviously that would solve a lot of problems) unless you have access to re-pop decals maybe keep it original and touch up all the rust spots after OA bath.
Not sure about the front-end collision and if that subsequent straightening of forkblades would fully account for the clearance, but it looks like there MIGHT be evidence of such damage so fully investigate. if you could take it to someone with a frame-builder's table and/or precision measuring tools that would be ideal, and they could fix it if it's bent.
Even with the shim looks like the seatlug ears might be pinched or once were deformed, get the set tube measured and buy the proper size seat post.
Looks like a nice frame and worth the effort to bring it back to life.