What early V8 engine was a favorite among hot rodders?

The early V8 engine that became a favorite among hot rodders was the Ford Flathead V8.

Ford introduced the side-valve, or flathead, V8 in 1932. It delivered V8 power in an affordable mass-produced car at a time when most inexpensive automobiles used four- or six-cylinder engines. That combination made used Fords plentiful and gave young builders a practical starting point for performance projects.

Hot rodders valued the engine’s compact design, strong short crankshaft, and huge supply of replacement and performance parts. They modified cylinder heads, camshafts, intake manifolds, exhaust systems, crankshafts, and carburetors. Mercury versions and parts were also used to increase displacement or improve output. The engine became closely associated with the classic prewar and postwar hot rod.

The flathead was not unbeatable forever. Its exhaust passages ran through the engine block, creating heat-management and breathing limitations. By the 1950s, overhead-valve engines such as Chrysler’s early Hemi offered greater performance potential, and later the Chevrolet small-block became a dominant hot-rod choice. Those engines were important successors, but the Ford Flathead V8 remains the defining early hot-rod powerplant.