Thanks for the advice, guys!

Yeah.. I was sorta wondering why he couldn't just replace the compressor (~$200 + new pressure switch + R12 fill).. which would only cost me like 400.. and instead, made a big deal of replacing all the fittings, dryer (which I just replaced no more than a year ago).. compressor.. and god knows what else.

They do R12 there.. but the guy admitted to me that he's a fan of 134a. I'll probably go back and just have him replace the compressor, instead. As for my radiator? I don't want to go fiddling around with my oil cooler lines.. so I'll probably just let him do that, too.