Found a guy on TR selling an AC compressor for a Nissan. Asked if its for a SR20det and the response I received was "Its a Nissan AC compressor, it mounts on the left side like all Nissan compressor..." How true it that are all Nissan car AC compressor compatible with each other? Are KA and SR compressors compatible with each others applications...??? Just trying not to spend money on a part and shipping for something that will turn to a paper weight if it doesnt fit or never belonged... Please help if you can