Working strictly from memory. Zimmer (A-N) offered three versions. They were the 40' single door, a 50' and a double door. The Zimmer is taller than the Sun Coast and has stamped metal inserts the go between the panels. Zimmers have stamped metal doors and ends. Sun Coast are white metal castings. I could go on but that should give you enough info to run with.
By the way, the 50' door & a half and the extended roof AT&SF car are Zimmer's also. Zimmer produced some really cool kits. He did many NP cars and the ACL ventilated box car (watermelon car).
As a matter of fact I still have a bunch of their kits. If I get a chance I'll dig out a built Sun Coast and a Zimmer and shoot a couple of photos for comparison.
By the way, whoever built them did a fantastic job. Having said that, you probably deserve credit for any restoration also!
Jay
