My problem was the striker bolt was too high, after I replaced my door hinges.
I did't know the striker bolt could be moved up down and inside outside - a little bit.
That's all I need. Now my driver's door closes SO easily, I have to keep checking it to make sure it is fully closed. Where as before, I would ALWAYS have to open it and SLAM it shut to get it to close on the second latch.
BTW: I left it like this for about three years. My door latch mechanism wore through the top, and my striker bolt area on the body got all cracked from stress.
I took my door apart, took out the mechanism. Greased it all up, put in a new door striker bolt after I welded up all aroud it on the body.
I still need to raise the entire door about 1/4" and then move the striker back up a 1/4" and it will sit like it was new. Well - someday I will do that. But I anticipate running topless, doorless, and tailgate-less this summer.
I am still not sure what I will be doing about a side-view mirror though.