In your first post, you mentioned that the electrical cover had been off for years. By that I gather you don’t have info on which fuses and relays do what?
If so, this picture might help; I believe it is correct for our 79s (photo credit user tkmoore “Tim”):
When you mention you jumpered fuses 5 and 6 (on the panel, left to right), that would have been battery (via emergency flasher) to fuel pump fuse. May want to check that the blue 25A fuel pump fuse is still intact ie that the metal strip hasn’t fried in the middle.