When you buy an old Mopar, what’s your “gonna have to do “ list

So I’ve only been in the mopar game about three years now. I’m on my third Mopar (69 dart 68 valiant and just got the 79 d100)
I’m learning there are some have to do’s when you get one. My list is usually…
Ammeter bypass
Gauges as the stockers usually don’t work
Turn signal switch on last leg if not already broken
Headlight harness/relays

what’s your have you do post purchase list ?(other than usual fluids/service)
Dunno about other years/models, but power to my '67 horn relay (located near the horns) is always hot, so after frying part of the wiring harness, I fused it.