My new '67 Caravel- a few questions

[modarch]

Hi all,

My wife and I are proud new owners of a '67 Caravel. An image is attached below.

This rig of course needs some work, and I am starting to contemplate which systems I want to upgrade. I am not overly advanced in my RV electrical knowledge, but I have a few questions I would love some help with:

1) The entire electrical system is original. What parts or systems do you all recommend replacing while I am overhauling?

2) The wiring diagram in my owner's manual shows power going from the 120v panel thru a transformer then going to the low voltage panel. Does this mean that I should be able to power the lights in my coach that are 12v when hooked up to shore power? I am trying to find a way to supply power to all my light fixtures when I am on shore power... From what I can tell on this site it seems that is what a univolt does, but apparently the Caravels don't have one. I am thinking I need a converter, but need some advice on this.

Many more questions to come. Thanks everyone for what ever support and advice you may have.