GT40 Mk1

The Ford GT40 Mk1 featured 289 cubic inch (4.7L) V8 engine derived from Shelby Cobra program, producing 385-390 horsepower at 7,000 rpm through four twin-choke Weber carburetors in mid-mounted configuration. Carroll Shelby Shelby-American program development transformed early GT40 reliability issues into competitive endurance racing platform, with small-block 289 proving more reliable than larger displacement alternatives during 1966-1967 seasons.

GT40 Mk1 achieved Le Mans victories in 1968-1969 with Gulf Racing team running 289-powered cars, validating small-displacement high-reliability approach over brute force methodology. The 289 Mk1 represents crucial development step in Ford GT40 program, establishing endurance racing credentials before legendary 1-2-3 finish at 1966 Le Mans with 427-powered Mk2 variants, with Mk1 continuing success through late 1960s privateer racing programs.