The Ford 330 was introduced to Ford’s line of medium-duty trucks from 1964-1978. These engines were known for their reliability and durability, making it popular for commercial applications and work trucks.
As with most Ford engines during the period, increased fuel efficiency requirements significantly affected the power of the engines late in this run.
It is those efficiency pressures that ultimately led to Ford phasing out the 330 in the late 70s.
Ford 330 Crankshafts, Cylinder Heads, and More