Replacement vacuum advance can for 318 distributor

smokinnjokin said
Gentlemen,
Vac can on my 318 distributor broke. Trying to find a replacement, would be great if I could find one that fits at an auto parts store. Currently the arm is marked 10, its a 2642718 distributor spec sheet says 10.5-13.5 distributor degrees at 15" vac.

Distributor is on a nice warm 360 with cam, exhaust and intake, so I wouldn't mind a little less vac (thinking maybe 8 distributor degrees?) so I can run more initial timing.

What are my options here? I tried to swap cans with an electronic ignition distributor and the arms were a very different shape and not compatible.

I would want as much vacuum in the can as you can find. It has zero effect on how much initial you run. The vacuum can falls completely out on acceleration. It's only purpose is to clean up unburned gasses on part throttle or no throttle conditions and give "a little" advance at cruise. The amount of vacuum in the can should be completely ignored when timing an engine.