[Dan Case]

4V carburetors with a manual choke was a “late” Cobra feature.

Ford Motor Company converted to manual choke carburetors in late May 1964 in preparation for installing five bolt HP289 engines with manual chokes planned for a June 8, 1964 introduction in late 1964 Fairlanes and early 1965 Mustangs. The earliest known Mustang with manual choke as assembled a few days later.

Cobras got included in the conversion. If a new Cobra received an engine made after the change Ford made, it required a manual choke control.

The earliest installations into Cobras included a Ford cable and knob assembly to the right of the instruments and controls. At some point the knob installation position moved to the left side of the steering column. Chassis number did not mean anything but when the car was completed did.

Manual chokes were used in Cobras with manual transmissions (C4OF-9510-AL carburetor) and automatic transmissions (C4OF-9510-AT carburetor) as well as the two (2) street cars (CSX2553, CSX2555) and one (1) Stage I Competition car (CSX2497) using 1965 MUSTANG GT350 induction systems during the year 1965 near the end of Cobra production.