[Fredensborg]

Ok, here goes dumb question #1…wtf is this thing? I can’t think of any purpose it could possibly serve, and I am tempted to ditch it in en effort to liven up my motor.

 

[slimpartywagon]

That is your vacuum secondary…. Removing it isn’t going to liven up your motor.

 

[CrazyBRONCOguy]

Its how the cruise control on some of these older trucks work.
If its leaking will create a vacuum leak, but otherwise should not see a gain/loss from it.

 

[Fredensborg]

Ah, so it’s part of the carb then. If I put a different carb on it at some point than I wouldn’t need that then.

 

[rla2005]

It's not part of the carburetor. It is an add on device. If you change the carb to an aftermarket version you may have to fabricate how to attach the speed control link if you want retain that function. Not a big issue.

 

[Fredensborg]

My cruise control does work still, I'll just leave it be for now. Thank you for the responses guys!

 

[miesk5]

Yo Fredensborg
See Speed Control in 1980 Ford Truck Electrical Chassis Highlights by [email protected] 1980 Truck Service Highlights - Electrical
Explains electrical features of the Bullnose trucks, including the exterior lighting, digital clock use, speed control installation & testing, CB radio installation & controls, ignition switch removal & installation & logic test, fuse panel, etc.



in pages 62-65 @ 1980 Truck Service Highlights - Electrical