Assembly of the inner caps, outer caps, plug wires, gaskets, and o-rings is definitely tedious.
First make sure the inner cap fits the distributor housing. Seems like half the distributors have been dropped at some point and the side openings are no longer quite round. Sand the housing opening and inner cap where interference is found until the inner cap slides in easily.
Once the inner cap fits into the housing put the distributor together enough to have the shaft and rotor in place. Spin the shaft and find all the tangs on the rotor and cap that hit. Disassemble and file the brass tang(s) down that are hitting. Reassemble and repeat until no contact. Take the inner cap back off.
Repeat the above for the other side.
Assemble the rest of the distributor (if it was taken apart).
Next fit the spark plug wires to the tubes.
Add the rubber boot over the spark plug wires.
Add the outer cap over spark plug wires and shoved into the boot.
Add the gasket in question over the spark plug wires.
Plug each spark plug wire into the inner cap (this is annoying) without damaging that gasket.
Carefully squeeze the outer and inner cap together without snagging that gasket. The gasket will extend out passed the edge of the inner cap.
Put the o-ring onto the extended point of the outer cap that is sticking through the inner cap. The o-ring basically holds the whole mess together.
Put the whole mess onto the side of the distributor.
Image from Van Pelt's website of resources (
http://www.vanpeltsales.com/FH_web/f...electrical.htm)
