Sounds like a nightmare, am not that bothered about having air con on a Cossie if its going to cost a fortune, would you believe it that the last owner actually had the standard 4x4 intercooler converted to RS500 size outlet to throttle body as the car runs RS500 8inj setup, still uses 4x4 intercooler so aircon could stay ! might be aswell to rip the whole lot out but i will try one of those £60 kits off of ebay 1st as they are selling R12 gas kits & sealer !!!

Simon.