Air Conditioning Parts List

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I have a 1987 Silverado 4x4 with a 350. My current compressor, hoses, accumulator and evaporator are all leaking and my ac does not work. I live in West texas and I'm tired of toughing it out. I've made a list and Im looking for direct bolt in parts, I don't want to have to chase down belts, brackets ect. Hoping to bolt it in and go, it doesn't have to blow 38 degree air almost anything is better than what I currently have. My biggest concern is the condenser size. I can't find the exact dimensions of the stock and I can't get around mine enough to measure. I also understand even though I've found a parallel flow condenser it is not a true parallel flow. If i'm replacing all of the other parts I figure I will replace it as well. If I've read right I also need the green o rings. Anyone see anything I'm missing, or might not work, or might not direct fit? Also I plan on going with r134a. R12 cools better, but r134 I can run down to the parts store and refill if need be. Thanks in advance for any help or hints.
My current plan is to replace all the
Compressor
Evaporator
Hoses
Accumulator
Orifice
condenser
with these parts
Compressor
http://www.oreillyauto.com/site/c/de...2645&ppt=C0354
Evaporator
http://www.oreillyauto.com/site/c/de...2684&ppt=C0355
Accumulator
http://www.oreillyauto.com/site/c/de...1951&ppt=C0328
Orifice
http://www.oreillyauto.com/site/c/de...2728&ppt=C0328
Hoses
http://www.oreillyauto.com/site/c/de...2718&ppt=C0352
condenser
http://www.autopartswarehouse.com/sk.../SPI73642.html
retro kit
http://www.oreillyauto.com/site/c/de...&keyword=rkr-8