ac install in a 1958 Caravanner 22

Hi folks.... just bought a beautiful old girl and living in Florida wish to install

an ac unit before the summer heats up.

Reading some of the posts here I am sure it is not wired for this and

wonder how difficult it is to install.... ?

I'm looking at the low profile Dometic Penquin .... it sounds like Camping World

doesn't want to mess with the vintage campers.

Appreciate any guidance.

Thanks!!

1958 Caravanner 22'

Kelly