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Ford’s Cologne, West Germany–built V-6 had been offered stateside in the Mercury Capri since 1972, but some upgrades were made for service in the heavier Mustang II. Most significant is that it was bored and stroked to 3.66 × 2.70 inches to increase from 155 to 171 ci (from 2.6 to 2.8 liters) and its shared (siamesed) exhaust ports were separated to greatly improve exhaust flow. 447
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Steve Magnante (Steve Magnante's 1001 Mustang Facts: Covers All Mustangs 1964-1/2 to Present)