Good morning! I am in the process of buying a 1958 Chev fleetside BBW shortbox. The seller states it has a crate 350 engine from Regis Engines? Anyone familiar with that company? Truck does not have a/c so am wondering what would be the best in terms of functionality/fit and finish a/c unit for the truck? I see many people have installed Vintage Air units but they are quite costly. The appraiser I am dealing with has restored many cars and he is suggesting a unit from a GM car or truck? Any tips/thoughts and or suggerstions would be greatly appreciated as this is my first foray into owning a 58 BBW fleetside! Thanks and have a wonderful day!