I need to know where 90's Tuneport inject Camaro's are getting the vacuum for the brake booster.

I have a 79 C10 with tune port injection out of a 92 Camaro. I just added a brake booster and would like to know where I should be getting Vacuum.

Will one of you guys look under your hood and tell me which place. I have two on the front of the injection. One larger upper and a smaller one below it. Large one is caped off. Lower one is currently going to my pvc valve.

I have two at the rear going to tranny and 10 other places.

I have one under the injection about center rear. It is going to some sort of pressure regulator for the fuel rails.

That's all the ports I know of.

Thanks

 

drivers side of the manifold. not the fitting on the plenum. thats where mine is. its tucked behind one of the runners, and uses 3/8" line. i forget what the large one on the plenum goes to, i just blocked mine off