Koolkar, I do have one other question. The new front evaporator is already for R134a, but the used rear Suburban unit is an R-12 unit. Other than flushing, is there anything that needs to be changed with the expansion valve to work with R-134a?

I've been told that you generally need to change the orifice tube when changing refrigerants. If so, what do we need to ask for to get the proper part?

Thanks,

---> Bill