My '53 truck flathead/49 merc trans combo is giving me headaches. Something is in a bind or out of place.It's making a metal rubbing noise, mainly when I push in the clutch. As I push in the clutch while ideling, the engine sounds like it's losing rpms. As I'm driving I can hear the sound. At first I thought it was the starter, because a friend pushed the rear of the starter towards the block and it quieted down. So I located a starter brace and put it on. It still does it. I took off the inspection plate on the upper bellhousing and reached in and turned the throw out bearing to make sure it was turning. I also bumped the starter to look at the pressure plate bolts, they look good. I had my wife mash the clutch as I watched to make sure the crank shaft didn't have any end to end play to check the thrust bushing. Any other ideas?? Thanks. And please, no boat anchor - get a chevy remarks.