If you have a 250Ci inline 6
With Auto Trans
then you need a timing light
Look down at the bottom crank there you will see a guide
Clean it with a Wire Brush.
Find the "Mark" (looks like an arrow in the pully on the bottom crank)
mark it with a peice of white chaulk.
bust out your timing light and your looking for the timing to be at
4 degrees Before Top dead Center
and your dwell should be right around 40
or if you just wanna set the points quick use a match book cover
and if it fits snug but not too tight between the points that should do it.
a new Cap Rotor Points and Condenser With wires and plugs will insure that you feel the difference.