Thanks, Y'all! I'm gonna pull the stick and eyeball the little nylon bush. I've run nothing but Castrol 20-50 in there since the rebuild way back in 1980, and it has made this sound about as long as I can remember (which ain't all that long...) I know it's been more noticeable the last few years...
I'm going to drain it and put Redline synthetic in there... their MTL and MT90 oils were highly recommended by several folks at the last show I was at... The MT90 is supposed to be equivalent viscosity to a 20-50 engine oil and is designed for manual transmissions. We'll see if it makes any diff.
TTYL!!
Mark