The GTO was redesigned for 1966, although the styling remained similar. The rear saw the most change, with distinctive louvered tail lights. It became a separate model rather than a Tempest option. The engine choices remained unchanged, although a new "XS" option, which featured revised cam timing and air intake, became available, although the number sold was only about 185. With 96,946 units sold, 1966 was the best sales year for the GTO.
1966 Production
Two Door Coupe, $2783: 10,363
Two Door Hardtop, $2847: 73,785
Two Door Convertible, $3082: 11,311
Engines:
389 4bbl V8: 77,901
389 3x2 bbl V8: 19,045
Total: 96,946
Available Engines:
Single Carter four barrel carburetor.
335 hp
389 cubic inches
Compression: 10.75 : 1
389 3x2 bbl V8
360 hp
389 cubic inches
Compression: 10.75 : 1
1966 Performance
Car and Driver, 1966
389 3x2 bbl V8
0 to 60 mph . . . . 7.5 sec.
Car Life, May 1966
389 3x2 bbl V8
0 to 60 mph . . . . 6.8 sec.
0 to 100 mph . . . . 19.2 sec.
Standing 1/4 mile . . . .15.4 sec. @ 100 mph
Fuel consumption while tested, 12.4 mpg
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