Dash Vibration

Older cars have vibrations man. My 86 rattles like a can of marbles when I drive on less than stellar roads. I just slowly go after them one by one. There is a whole lot of what I call "furniture feet" throughout my car guarding against vibrations.

The Mac parts may be a coincidence unless the pipes themselves are vibrating I cannot see them being the problem and remember even if it feels like its from the dash it may be coming from nowhere near there but I can't tell you where....it would just be an uneducated guess, and as for all old cars vibrate I am sure that is true but some may be called normal others indicate a problem. My car is pretty tight for almost 20, tighter than most at that age.lol. Tighter is better. IMO.

could they be your hanger insulators for the H-pipe? or possible a speedo cable , because I know my speedo cable will make a clicking sound and it bugs the hell right outa me.