I have a few Datsun Air Conditioning compressors laying around. Physically factory s130 and s30 (280z Specifically) compressors are the same (Flange type aside). But the flows are reversed between them. If you have your Factory A/C hoses you'll probably want the s30 compressor or you can just have an A/C shop make a set of hoses to match the compressor you decide to go with.