Ford Windsor Engine - Boss 302

Boss 302

The Boss 302 was a performance variant of the Windsor, putting what would become Cleveland heads on a special, heavy duty, 4 bolt main Windsor block to improve rated power to 290 hp (216 kW). According to some reports, the canted valve, deep breathing, high revving engine could produce more than 310 hp (231 kW), although as delivered, it was equipped with an electrical rev limiter that restricted maximum engine speed to 6150 rpm. A bulletproof bottom end, thicker cylinder walls, steel screw-in freeze plugs, race prepped crank, special HD connecting rods and Cleveland style forged pistons kept the engine together at high speeds. The key to this engine's power was the large port, large valve, quench chambered, free flowing heads. The Boss 302 Mustang was offered only for the 1969 and 1970 model years.