C4 vaccum line

[mattyq17]

Where should the vacuum line go from a C4 transmission? Right now it is going to the back of the manifold but I read that it should go to one of the ports on the front of the carb. I have an edelbrock 1406 carb, with the front left port going to the distributor and the right one is currently blocked off. Thank you.

 

[blubuckaroo]

My '77 had it connected to the vacuum tee at the rear of the intake manifold.

 

[Rustytruck]

It goes to manifold vacuum. One of the ports on the carb also has manifold vacuum so it works either way if you get the right port. There is a vacuum port on the carb that has no vacuum signal at idle that is for the distributor advance.

 

[76YETI]

The elderbrock 1406 has a stand alone vacuum port for power brakes on the back of the carb in the middle that is blocked off with a plug. Remove the plug, add the Edelbrock Adapter fitting 8080 and your in business.

 

[mattyq17]

Thanks guys I will leave it at the back of the manifold as it looks cleaner than running another line to the front of the carb.