Join Date: Dec 2001
Location: Belleville, Illinois
Thanked 22 Times in 17 Posts
You're missing something in the picture I posted. The cover does come up to the bottom of the cap or cap adapter. The cap is sealed to it and to the distributor housing with a little silicone grease or duck putty.
IIRC I sealed the vacuum advance and the cover to the distributor housing with silicone caulk since they only need to come off to change the vacuum advance.