I finally got around to replacing the spark plug wires, to complement the replacement of the distributor cap and rotor and plugs.
Also figured out where the dang idler adjust screw is and have adjusted it so that she idles just above 1000rpm while in neutral and just below 1000 rpm when in Drive. She feels a lot smoother now in terms of idle vibrations.
The data plate on the chassis says idle speed in neutral should be 700-800 but at that setting she shakes quite noticeably so I will live with this higher rpm setting till I figure out the real reason for the rough idle at lower rpms...could be a vacuum leak or my motor mounts which are apparently shot.
Will probably have a mechanic do the motor mounts replacement though since I am not sure that doing this myself is within my comfort level of expertise.
Network Integration Engineer
MCSE, CLP, CCNA