Magnum been sitting a looooong time.

Newbie here. Hello all! I’ve got a 2000 Magnum 325 4×4 that has been in barn for far too long. Life gets in the way sometimes. Anyway, my kiddos and I started working on it yesterday. Plan of attack is fuel system, oil service and battery. What’s best way to clean inside of gas tank? Gonna change out all fuel lines and inline filter. What about the fuel pump, is it safe to run carb cleaner through it? There’s a lot of stuff to remove to get to carb (lol).