Does anyone know hard it is to put a/c on my 89 2.6 4x4 mighty max? It is a carb engine with the weber kit and no factory a/c. I wanted to put a/c on the truck since im going to be taking it on trips. Would anyone know how hard it is to install and what I need to install it? I absolutely love my truck but on a really hot day it makes me look at my other car.