I have a 1965 Dynamic 88 Convertible that that has heater only I want to put air conditioning in for those 105 days. I have a doner '88 that has a complete system and I am planning to swap it over to the driver/show car. I am expecting a lot of work on the firewall and under the dash. I would like advice and/or info from anyone who has ever done (or even contemplated doing) a mod like this or had any ocassion to cut big holes in the firewall or rummage around under the dash. Or anybody else ...