Can anyone suggest the best steps to take to overhaul my ac. I've gone through 2 compressors and would like this one to last. I know that I should replace the dryer. Is there anything else that should be done? I plan on buying a rebuilt unit since I have not had any luck with all others so far. I don't want to waste good money on a new one if its not going to last. I first need to replace the hose that runs through the fire wall. It is leaking at the front connection. Should I flush out the system? If so, what do you reccomend I use? Thanks in advance.

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85 300TDT 456,000 orig. miles