1980 D150 fuse block?

I've got a friend I'll check with for you in the morning. He may have a very low mile example or know where a new one is. I may need you to post some pics of your harness and fuse block. I can't remember the exact details but it seems like that was one of the transitional years in the electrical department along the way to the '82 and up body style. But if you haven't checked yet, LMC truck may have what you need there.