Dual Vacum DIzzy

[badazz68stang]

on my 68 289 it has a dual vacum setup. on the distributer, anybody else have this setup, and how should the vacum lines be ran to my edelbrock. also on the thermostat housing there is a vacum switch with three ports, can anybody give me some insight on how to run the lines on this set up as well?
and finally, im buyin a pertronix setup that is for my motor and doesnt specify single or dual vacum, should i worry about this?

 

[WORTH]

the pertronics wont care, but if it were mine I would take the money your going to spend and get a duraspark setup with a single diaphram. You'd be surprised how cheap they are from the auto parts stores. If you do you'll need the distributor, the control box and the coil.

 

[dawtips]

sorry to hijack, but nice stang on the right Worth

 

[darkhorse70]

See these two links:
http://www.autozone.com/servlet/UiB..._us/0900823d/80/1c/36/c9/0900823d801c36c9.jsp
http://www.autozone.com/servlet/UiB..._us/0900823d/80/1c/36/e2/0900823d801c36e2.jsp

 

[bnickel]

this has nothing do with the dis-o-vac system for emissions. the dual diaphragm is actually a 2 stage system the first stage is your normal advance and the 2nd stage is actually a high speed retard or rather a high load retard, it's designed to keep the engine from pinging from under heavy throttle conditions.