Sorry, I didn't know how to word this right but I have a 1990 350 TBI with air. I have a gear-drive-like noise under the hood that is from something belt-driven. We stethoscoped it last weekend and it seems to be the a/c compressor. It's been inop for a long time now. What I need to know is there an idler on non a/c engines or nothing at all? Can I bypass it somehow? Or can someone sell me a compressor for cheap? I think onboard air would be nifty /forums/images/graemlins/smile.gif. The main thing right now is I think the drag of the bad compressor pulley/bearing/whatever is affecting my mileage. I get around 8mpg on that TBI 350, that only has 78k on it. Not too good! Thanks!