screw and pad tang on throttle lever fig 7 8 and adjust the screw until it contacts or holds the gauge d Turn the idle mixture screw lightly to its seat and back out 11 z turns CAUTION Do not turn idle mixture screws tightly against seats or damage to needle seat will result VACUUM BALANCE TUBE ACCELERATOR ROD HEATER FUEL LINE FUEI TANK LINE t LEFT Fig 7 9 Cross shaft i NOTE The carburetors are now mechanically synchronized Any further curb idle speed screw adjustment must be duplicated on both carburetors 3 Preliminary Curb Idle Speed and Mixture Adjustment a Start engine and normalize 2 Connect Throttle Rods as Follows a Right Carburetor Connect throttle rod to carburetor cross shaft lever using retainer clip b Left Carburetor Rotate carburetor cross shaft with accelerator rod fig 7 9 to ensure positive closing of the right carburetor throttle valve Adjust throttle rod length in swivel until rod freely enters hole on carburetor cross shaft lever and secure rod with retainer clip r SSl nd VACUUM ADAPTER CONNECTION CROSS SHAFT t f CARB UE O FUEL LINES t r RIGHT ind linkage to Carburetors b Check timing c Connect vacuum gauge to adapter fig 7 9 on vacuum balance tube Remove transmission vacuum line on automatic transmission and cap on synchromesh from balance tube adapter d Connect tachometer to engine e Adjust curb idle speed duplicate adjustment on both carburetors to attain approximately