Inspect Mechanical Advance
Inspect Vacuum Advance
Check it to make sure there is no Vacuum Leak.
See Main Article: Vacuum Leaks
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.