1976 Scamp fuel gauge problems

You do realize that 76 is a one year only electrical system, and the cluster from any other year won't work. There are some real oddities to that system in relation to all other Mopars from that era.
Considering that you're finding all sorts of burned up parts in the trunk, and you're going through the trouble of changing out clusters, you might want to consider converting the car to more common 1975-back electronics. it may seem like a lot of effort and expense, but if you intend to keep that car, it may be a worthwhile investment,

Yeah, I've been finding that it's definitely a one of a kind. I'm thinking of converting it to HEI so I don't have to deal with ignition boxes going bad and I may try to put a GM alternator on it off of an S10 since I have one of those under warranty at AutoZone. The main reason I bought the cluster is because the speedometer needle is bent because the magnet fell of and grabbed the cup; at least that's what it looks like. So I don't have a clue how fast I'm going, but the odometer still rolls over so I know how many miles are on it and that's how the previous owner kept track of how much gas was in it. I will say that the cluster I bought appears to be identical even though it came out of a 72 Duster according to the listing.