1966 Center Carb Throttle Shaft. Tri-power Engine Compartment Phenolic has a "high coefficient

Phenolic has a "high coefficient of heat transfer

95% of the time the covers are chipped up that the slot for your screwdriver is chipped away or broken off

Includes  needle / seat

If you can't see the Index in the picture attached to this item

Some carbs had the  90 degree as cheap substitution

1966 Center Carb Throttle Shaft. Tri-power Engine Compartment Phenolic has a "high coefficientExcellent quality, fits perfectly. New brass screws included. The center carb shaft is often worn, resulting in inconsistent idle because of vacuum leaks. New shaft and new arm resolves the problem of a loose arm which is common. Shaft also fits newer 2bbl. Rochester carbs.