Vacuum advance on 427/428 cars

[strictlypersonl]

Originally Posted by DougD

If you want a reliable and relatively cheap vacuum advance electronic dist, you can buy a Ford Duraspark rebuilt unit from just about any auto parts store (NAPA, Auto Zone, etc.) for about $75. As for a dist for a Ford truck with a 360 or 390 from 1975 or so.

Is it small enough to fit with a standard expansion tank?

[Cobra 29]

MSD makes a small billet distributor with vac advance for a 351W. Unsure of one for big block. If they do, be prepared to swap out the vaccum module with an Accel version to gain control over the amount of ingition advance from the vac unit.

[DanEC]

Originally Posted by strictlypersonl

Is it small enough to fit with a standard expansion tank?

Oh oh - that sound ominous. Bob, I plan on purchasing one of your expansion tanks for the motor. Are you saying a vacuum can will normally intefer with the expansion tank????

Dan

[DougD]

Originally Posted by strictlypersonl

Is it small enough to fit with a standard expansion tank?

I'm using the MSD myself, but the Duraspark is the same diameter - can't see why it wouldn't work with the small cap on it. I'm considering swapping out the MSD for a Duraspark to see if the vacuum advance yields better highway mileage.
As far as the vacuum cannister - 60's Fords used vacuum advance and the puke tank on FEs without a problem. Obviously the Duraspark wasn't around in the 60s.