The aluminum plate between the transmission and the engine is what locates the starter. If the hole is worn out in your plate, you will have a hard time holding the starter in the proper position, no matter how tight you make the bolts.
Count the number of teeth on the bendix of the starter. I am going by memory which is not very good, but something about people with this problem were using a Ford Escort starter or bendix, that had 10 teeth on the bendix and this was just enough to cure the starter engagement problem. I think the original starters had 9 teeth.
If you do a google search, something like Ford 10 tooth bendix or something like that, maybe it would come up. You could try it on a search in here and see what would happen.
Count the number of teeth on the bendix of the starter. I am going by memory which is not very good, but something about people with this problem were using a Ford Escort starter or bendix, that had 10 teeth on the bendix and this was just enough to cure the starter engagement problem. I think the original starters had 9 teeth.
If you do a google search, something like Ford 10 tooth bendix or something like that, maybe it would come up. You could try it on a search in here and see what would happen.

