I need some advice.  I have the opportunity to purchase a clean 1987
Westy in good mechanical shape for a decent price.  Only problem is that
it was never equipped with A/C.  I have two questions. 

Should this be a deal breaker?  Obviously, when it's 110 outside, the AC
question looms larger but I wonder how important it really is given the
inherent problems with the factory system.  

Also, how much would it cost for an entirely new AC installation either
with a Behr or other system?  Any advice would help.  

Gerry