If you want to find this.. go to sears or harbor freight, local parts place...anywhere. Get a stethescope. It's well worth $10-20 bucks.. ever want to pinpoint a noise..that'll do it.
used a stethescope to figure out a GTP i was lookin at had bad bearings in the SC
2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"