Ford 302 V8, started as a 221 in 1962 and proved themselves reliable and a decent performer through the mid/late 1990s. The appeal of the Mustang "5.0" liter 302 was so great that Ford is again making a new/different 5.0 engine, the Coyote.
Ford 300/straight 6. This engine was produced from 1965 into the 1990s. They appeared in everything from regular cars to dump trucks to tractors to Baja 1000 trucks.