My 92 is still an R12 car and the A/C is empty. Needs either someone with a tank of R12 or a conversion to R134A. Talked to the only mechanic I trust in the area who is also a classic muscle car guy and he said just do the conversion. Says I just need the adapters and to get all the mineral oil out. He has done it on many of his restos and said the biggest deal is leaks(which he will test for) and if it does have a small leak R134 would be less precious to lose than the R12 that right now I can't even find. Makes sense to swap to me. The only reason I would have him do it instead of swapping it myself is I have no idea how to get that oil out. Anyone ever done it? What tools/pump do I need?