by Bill Elder
A piece of cake. Not so fast! There was no clearance for the arm on the vacuum advance. Of course, I didn’t realize this until I received the module from Summit Racing. The unit that I purchased, 9138SL-S, was designated for Chrysler V-eight engines and a check showed that they would work on 413 engines from 1959 to 1965. Pertronix failed to mention the problem with the vacuum advance arm. The first step involved a trial fit to draw a rough outline on the mounting block of the area that I would have to remove to gain clearance for the arm. There were a couple more trial fits and
additional trimming until the proper clearance was achieved. After final mounting of all of the components, I used the Mighty Vac to check the vacuum advance operation. I also rotated the distributor shaft past all eight high points on the point activation block. I got very consistent air gap readings of .016” between the Pertronix module and the points block. I installed the distributor and the matching Pertronix Igniter II coil, bypassed the ballast resister for a full 12 volts and the engine fired. I will be sending a note and pictures to Pertronix regarding the vacuum advance arm. Hopefully they will be more forthcoming with any future literature and instruction sheets.
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