1966 Hollow Stud Tri-power Engine Compartment New bases are fitted with

New bases are fitted with new shafts

heat from the motor is absorbed into the carburator

or newer Pontiac 2 bbl with the "taller" airhorn

It is difficult to take a photo of these that really shows what they are

fuel block for front carb

1966 Hollow Stud Tri-power Engine Compartment New bases are fitted withExcellent 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.