Vacuum advance on a 409/425

[Jayz63]

Hello I searched this site and couldn’t find a picture of where to hook up the vacuum advance on my engine. I have the original carter AFB’s and can’t find a place to hook up the line. On the rear carb I have the vacuum line for the power brakes and the front carb rear has a plug in it. I wasn’t sure if I need to hook up the vacuum advance to the rear of the front carb. Thanks.

 

[Fathead Racing]

I looked for a picture of the stock 63 Afb without success. It would help if you would post pictures. I can say this with confidence. Your vacuum to the advance need to be hooked to manifold vacuum. That is any port under the throttle valves. If you can find a hollow carb stud you can pic up the vacuum there. I think Show cars sells the hollow carb stud.

 

[4speedman]

I think someone else ask about this awhile back and the factory hooked it to the back side of the front carb with a elbow fitting that's the way I have mine. The hollow carb stud will work just as good if you are not worried about being factory correct.

 

[Jayz63]

It might go behind the rear carb here is a image off of show cars.

 

[Jayz63]

Okay nice do you have power brakes and if so are they hooked up to the rear carb? 4speedman

 

[4speedman]

No I do not have power brakes and that is not the fitting you need for the front carb

 

[Jayz63]

Yeah that would be for the rear car to support brakes and possibly vacuum advance

 

[1958 delivery]

$12.95
https://www.ebay.com/itm/1959-62-CO...425966?hash=item41bb6e0d2e:g:JtgAAOSw5cNYcALn

 

[La Hot Rods]

What cam are you running?

 

[Jayz63]

I’m using an isky 110 241 296. That’s the part number

 

[La Hot Rods]

Out of the 63 assembly manual.

 

[Jayz63]

Awesome I looked in mine and must’ve overlooked it. Thank you.

 

[El Rat]

Ported vacuum bad manifold vacuum good!