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Old 08-25-2020, 12:37 PM   #5
dmsfrr
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Default Re: 1955 F100 239 Carb/Dist Upgrade

Quote:
Originally Posted by JeffB2 View Post
Hands down he just gave you the best advice available. .....
BorisK, just FYI,
The pre '57 Loadomatic distributors advance the ignition timing based only on a low pressure vacuum signal from a year matching carburetor, 0 to 5 inches of vacuum. There is no mechanical timing advance in those distributors.

Ford updated their distributors to primarily mechanical timing advance starting in '57, and changed the vacuum function to more of a 'fine tuning' thing, using a 5 to 20 inches of vacuum signal from the redesigned newer carburetors.

Fixing what you've got will be the simplest thing to do. (at least until you're ready to change a lot more under the hood)
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