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The engine was based on the ultra high performance 427 side-oiler block, in the Ford FE engine family, providing race-proven durability. The block and associated parts were largely unchanged, the main difference being use of an idler shaft instead of the camshaft in the block, which necessitated plugging the remaining camshaft bearing oiling holes.

The heads, of course, were entirely new, cast iron with hemispherical combustion chambers

Ford's plan was cut short, however; although Ford sold enough to have the design homologated, NASCAR effectively legislated the SOHC engine out of competition through rule changes, and the awaited 1965 Ford SOHC vs. Chrysler Hemi competition at the Daytona 500 season opener never occurred. The engine found its niche in drag racing, however, powering many A/FX Factory Experimental Mustangs, and becoming the basis for a few supercharged Top Fuel dragsters