what is this plug?

[curse]

My crate motor has a distributor in it with this plug but the truck harness does not have the other end. Am I going to have to use a distributor without this plug?

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[Snoots]

If I'm not mistaken, that's a plug for a dizzy that has an Electronic Spark Control. Just let it hang.

 

[curse]

I'll try letting it hang and see what happens. Thanks.

 

[bucket]

Does the distributor have a vacuum advance can on it?

 

[curse]

Yes it does

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[Snoots]

That needs to be hooked up to a vacuum port.

 

[curse]

I know. I got all new vacuum lines and haven't ran them yet.

 

[RoryH19]

The plug is for the electronic spark control, ESC. It was used in the 80's and most people bypass since they are faulty.
Here is a writeup I used to bypass mine before I did a LS swap.
http://www.73-87.com/7387garage/drivetrain/escrepl.htm
Basically you need to cut and splice the black and green wires together.

 

[highdesertrange]

I never knew they came with both vacuum advance and Electronic Spark Control(ESC). I always thought it was one or the other. learn sumptin everyday. highdesertranger

 

[bucket]

I never knew they came with both vacuum advance and Electronic Spark Control(ESC). I always thought it was one or the other. learn sumptin everyday. highdesertranger

There were some that didn't have a vacuum advance, but those were in some models of cars.