year            engine            dist make dist#        Pertronix#   
65-66           190,230             Delco                 1162A 91162A
All              6 cyl            Autolite IAT-4010       1569
All 6 volt positive ground          Delco                 1188P6
60-61 Lark       V8                 Delco                 1181 91181
All dual point prestolite                  IBS-4012       1584

No Pertronix ignitors for single point prestolite
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Order Pertronix units through Fairborne Studebaker ( see vendor page)
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 Installed the Pertronix electronic ignition in my '57 Clipper. 
 Can't tell for sure if it's more powerful since I've never done any 
timed runs with it.  I do know however, that it idles more smoothly. 
 The big difference I've found so far is that the gas mileage over the 
first 100 miles jumped from the dismal 12 mpg it was getting to 17 
mpg--nearly a 50% increase! The old points were not in bad shape but the 
wiring to the ballast resistor and coil were frayed.   I highly 
recommend the changeover based on my first 100 miles.
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Delco - Pertronix
Delco window style distributor.

Fitted with a Pertronix it's performed admirably but I've never been able 
to get the centrifugal advance where it is supposed to be.  There is enough 
travel but it didn't come in fast enough.  It seemed there was no 
combination of springs and weights that would give me the total advance 
needed at the recommended 1600 rpm.  I have been getting close but even 
when I thought I had it right, it would seem to change the next time I 
checked.

Today I decided to try another combination of springs and went to very 
light tension that would still snap the weights back when I let it 
go.  BUT, when I put the rotor on it wouldn't snap back without help.  I 
loosened the rotor just a little and it would return just fine.  At first I 
thought that somehow tightening the rotor down was causing enough flex the 
advance plate to cause binding.  Realizing that there just isn't enough 
force to cause the metal plate to bend I looked at the inside of the rotor 
and could see a little shiny spot on the molded in bracing.  20 seconds of 
filing and the advance comes in quicker and returns to where it is supposed 
to be.
Ernie
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