I have a 98 STS and the clutch seal went out on the AC pump. It turns out its a Mitsubishi pump, and haven't been able to find a reasonably price replacement pump. Can I retro fit a Delco pump on my car?
The car was originally equipped with a "Delco" compressor. As with most parts, it could have been made by one of many manufacturers, in one of several countries. The manufacturer is irrelevant, you can use any compressor designed to work with your car.