Help With Factory Cruise Control For 78

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andym22

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May 8, 2015
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Location
NY
First Name
andy
Truck Year
1977
Truck Model
k25
Engine Size
400
Adding factory Cruise control to my 77. Can someone post a photo of where the wires and vacuum release go through the firewall? I know there should be a dimple on the firewall for drilling but can't seem to located it.
 
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Jeff Brown

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Mar 16, 2020
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Redding, CA
First Name
Jeff
Truck Year
1977
Truck Model
Scottsdale C20
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454
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Don't know if you've found the answer yet but here it is on my '77 Camper Special w/fact cc. As you can see, it's bundled with the wires for the cruise.
 

Bextreme04

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Oregon
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Eric
Truck Year
1980
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K25
Engine Size
350-4bbl
I have an 80 K25 with factory CC... mine goes through the same way wit ha single bundle of wires and large vacuum line going through that same spot.
 

andym22

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Location
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andy
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1977
Truck Model
k25
Engine Size
400
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Don't know if you've found the answer yet but here it is on my '77 Camper Special w/fact cc. As you can see, it's bundled with the wires for the cruise.

Thank you for the help.

Now I'm trying to figure out how to mount the cruise control servo bracket with a holley carb one bolt goes through the head, but there are two holes that would have attached to the rochester control lingage bracket. I don't see anything from holley to adapt the universal linkage bracket to attach the servo bracket. Does anyone know of someone that makes this mounting bracket?
 

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