Factory A/C vs. Aftermarket A/C

[bludshaker]

Has anyone done the opposite of what Tkmadone has done? I'm installing a motor with a factory GM serpentine set up on it. All I need is the under dash pieces. I have a compressor, drier and condensor already. Would it be worth buying the under dash kit from a company and hooking it up to what i have already? Or should I buy a complete kit from a company and use all of the components together? Would the aftermarket compressor even bolt to the factory style serpentine brackets!? I know Classic Auto Air sells the in cab parts as a kit and thats what I was thinking of buying. Plus they are 20 mins from my house so I can pick up the parts locally!