I think I got it. I removed the striker bolt from the jamb and tried it for fit in the latch, and it fits in and locks fine. I set the striker bolt up in my vice and did a little more creative grinding, then reinstalled it. So far---so good. Have driven about 70 mile this morning and door stayed latched like it is supposed to.---Incidently, the striker bolt has the strangest thread on it I have ever seen. It looks like a 3/8-16 unc thread, but it isn't. It measures at 0.412" (10.5mm) outside diameter.---I can't even find that in my "Machinists Handbook".