1966 Hollow Stud Tri-power Engine Compartment We ran our modified carbs

We ran our modified carbs on a Kauffman build motor of 461 cu

These are the air cleaners studs for the large 1957 air cleaner

or newer Pontiac 2 bbl with the "taller" airhorn

You will use your existing for this conversion

( not added with two screws like some do)

1966 Hollow Stud Tri-power Engine Compartment We ran our modified carbsExcellent exact reproduction. This is not the repro hollow stud other carry. Even has the correct bevel on the edge of the nipple, silver zinc plated.. Should be located in the center carb position, passanger side, rear. Used on GTO with air and all full sized cars supplying vacuum to heater controls. Some add this stud to supply vacuum for vacuum gauge.