A/C pump and clutch

DentalDart said

Is this an ac unit for a sb? What freon was run in it? I need to replace all my ac parts and see if I can get it to work, did you switch to the smaller compressor?

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The compressor fits any small block. I bought it as a remanufactured unit and ran R134A in it. Worked great. You just have to make sure you run the correct oil - going from R12 to R134A. In my case, I had to dump the oil in the crankcase ( measure how much you take out ) and refill with pag oil - compatible with R134A.