I have a lot of questions in mind, but I'll try to address at least some of them here. Given the situation, I would have replaced everything with new parts, including the the evaporator, because you never know what's lurking inside a system that has been open for years—including gunked-up oil mixed...

Hi all, So, this system was open for what must have been years. I bought it from someone out of their backyard. It is a 1984 Chevy K20. I've been working on restoring it for about 15 months and now finally got it ready for the road. I ADDED a compressor, & replaced condenser, dryer and orifice t...