Comparing the Chevy 400 and Ford 400 small-block engines

Chevy and Ford both produced 400 cubic-inch small-block V8 engines in the 1970s, but they differed significantly in design and performance. The Ford 400 featured a taller deck height and a more symmetrical bore and stroke, while the Chevy 400 utilized its existing small-block architecture with a larger bore. Neither was a high-performance factory engine. Stock Chevy 400s generally produced more power than stock Ford 400s, though both could be modified for significantly higher output.