Heart of the Pony: Ford's All-Time Top Mustang Engines 5
The 1964-65 289 V8
In 1964 there were a pair of V8 engines available for the Mustang, but the 210 horsepower 289 cubic inch mill was the biggest.
By the 1965 model year, the 289 was the only V8 in the lineup, a year which also saw the debut of the first high-performance Mustang engines. The healthier 289 HiPo packed 271 horsepower, while the 289 deployed with the1965 Shelby GT350 offered an even more impressive 306 horsepower.
The 289 would remain in the Mustang stable until the 1969 model year, but would make its most impressive numbers on the '66 Shelby supercharged GT350S, where it pumped out a tire-shredding 390 horsepower.