....In my '32 Ford with a small block Chev motor I have a REALLY strange noise. Is sounds like a muffler rattling but it only happens when the motor is idling or going really slow in forward or reverse {like 1 or 2 MPR or less}. I put it up on a rack today & couldn't find anything lose {or at least what I did find that was lose I tightened & it still rattles}. It sounds like it's coming from the engine & it's not lose headers. The car runs REALLY strong so whatever it is, it's not hurting the performance any. Any ideas??? THANKS Bill