Ok so I bought a Holley Pro-Jection manifold and I was checking everything out today to make sure it would work out alright and there is no place for the vacum line for the power brake unit. So I am wondering what you guys did with yours?

 

You can use another port on the intake for it. There should be another vacuum port to tap into. Carb intake guys do the same thing.

 

I kind of didnt want to run all of the vaccum controls off of one port. Do you think it would be a bad idea to drill a hole in the side and tap it out to the size i need for the fitting?

 

I think it is a bad idea only based on that it is easier, and if done right, cleaner looking just to T it off. I ran that same intake with the vacuum lines T'd, and never had any braking issues. I ran the same setup with the rpm airgap as well.

 

On my RPM I use a T and my friend who has the pro-jection also Ts it. I wouldnt worry about tapping it.

 

as long as you didnt do that in a stupid place, it wouldnt be a problem.

ive done it before.. no ill effects.