Where have you been? Wondering about you just the other day.
Your '87 has a 460 and carburetor, right? Fuse box in the underside of the dash, driver side? Do you know if there was ever a fuse clip on the missing side? I don't remember anything like that on the '83 we had, but I wonder if Ford stuck a clip in there to store a spare fuse.
I replaced a fuel pump fuse with a circuit breaker. Can't remember the position. I think it only blew once but I decided I'd rather have a breaker auto-resetting than try to replace a fuse in the middle of the road someplace.
This diagram might help

This diagram shows a blank spot in #5
