Vacuum sources 289 Performer RPM intake
Have an Edlebrock Performer RPM intake manifold on my rebuilt motor. It appears to have only one 3/8 npt fitting for vacuum. There are two small threaded holes. I have not tried to blow air through them but it looks like they bottom out as stud holes. So assuming I have one 3/8 NPT vacuum port can I thread a 1-3 brass adapter to get 3 - 1/4 inch vacuum ports? I need one for power brakes, one for C4, and one for distributor advance. I am not concerned about original as it is a restomod.