Why It Matters
The 1966 GT and GTA used Mercury's 335-hp four-barrel FE calibration with dual exhaust; the engine remains a configuration of the model-year page.
Also Known As
1966 Cyclone GT 3901966 Comet GT 335-hp 3901966 Cyclone GTA 390-4V
Part profile
1966 Cyclone GT 390-4V engine
engine part · Ford Motor Company
Used On
1 linked car page.
63H two-door hardtop or 76H two-door convertible
1966 Mercury Comet Cyclone GT
Cyclone GT hardtop or convertible; GTA identifies the Sport Shift automatic path