Emergency: Trying to change oil pump on 65 again

I'm not even worried about how difficult it will be. I know it can be done. I asked a guy at a local car show here that had a 64 Valiant 2-door with a 170 and he added aftermarket a/c to his with a newer style Sanden compressor and he said it wasn't a big deal. I've got shops I can get to do the wiring which is the hardest part to me but on this basic of an electrical system I could probably figure it out. If I can find a vintage unit I can restore it. All I would have to get is the drier, condenser, brackets, and compressor. I can find a universal a/c condenser, I could probably use the factory drier, and hopefully I can get away with using some Slant Six a/c brackets off of a later Slant Six equipped a/c car. I've got access to a reman. RV-2 and a new clutch. I restored a aftermarket a/c unit on my 76 Datsun B210 a couple years ago that worked perfect once done. It didn't even have screw on a/c fittings. It used the hose clamps with the barbs on it. I thought that was kinda strange until I saw every B210 with aftermarket a/c using those kinda clamps. It worked great but we sold it. It was just a fix and sell deal. This Plymouth I can track the parts down for next summer and I was just going to use it in the fall if I can finish it up quick enough. By the time summer comes around next year maybe I'll have the a/c goin. I had a chance to score a complete factory a/c system out of a 65 Valiant in the junkyard but it was too much work for the time I had. You can do it, I'm sure it's not as bad as you think.