Snap on something?

...........Actually you can do a load/ balance test without a scope. You need a good tach, preferably a dwell/ tach that is one with a lower RPM full scale. Pull up all 8 dist. tower boots. Depending on what you have, use a small thin grounding probe, or push very small brads or even paper clips down alongside each wire, so you can go 'round the cap with a grounding lead.