Inspect Mechanical Advance
Inspect Vacuum Advance
Check it to make sure there is no Vacuum Leaks.
See Main Article: Vacuum_Leaks#Use_Your_Finger_Method
Push the lever, then put your finger on the pipe. It should stay. Replace (or plug hose) if it the lever instantly pops back.
Inspect Contact Points
Adjust your 4-cylinder points to 49-55 degrees
Older style (analog) Dwell-Tachometer
On this type of scale with only 8- and 6-cylinder, 4-cylinder reading is DOUBLE 8-cylinder scale.