Another tid bit of Quadrajet tech to be aware of is worn out primary throttle shaft bores in the base plate.
Most know of the drill/rebush with bronze bushings, but there is another way without drilling throttle plate.
Quadrajets have a factory counter bore that just happens to be .030 larger that the throttle shafts. And is bery rairly ever warn to enough to impede on these counter bores.
What I did was to get a sheet of .015 Teflon sheet from McMaster Carr.
I cut 2 pieces about 1" long and 1/2" wide and work them into the counterbores on re assembly.
Works real well and when a rareish carb is being used, it could save these parts from a miss drilled oversized bushing hole.
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