Small Block Tach Drive Dizzy

The vacumn advance dizzy(3690430) uses cap#5007856. The older mechanical tach dizzy has larger & higher cap clamps and needs #4120886. Don't think mopar performance even carries this cap anymore since they just have billet unit still available, so ones out there are left in vendors inventory. Here is a pic of the difference. Picture sucks but regular#5007856 cap is on left & one you need is on right. Can also notice difference in picture from Jims catalog.

Oldschoolcuda