"OUT STANDING"--I haven't seen a 37 changed out. The 40-46 Is a little diff. from the 37 --also the 40-46 truck and panel jams are diff. I'm thinking of living the header and jams(lock side) on the panel and kipping the hinge side jam on the truck and making it join at the upper jam splice.-- At the top of the window I'm thinking of cutting about 1" up then put a step for a lap weld so the roof will lay on it. I like the way you did the sheet metal above the window. ---I haven't started yet so It's not written in stone as yet. Love to talk to you and get more pics.
--Thanks goneagain --lc34