Howdy Back GoB:
If you're asking will the later pulley and water pump go on an early engine? The answer is "Yes" for the water pump and "Maybe" for the damper. The diameter of the crank snout is the same, but the early damper measures 5 7/8" and has three bolts. The later measures 6 1/8" and has 4 bolts. The early ones align with an early water pump. The later ones align with late water pumps.
IF you're asking if it will fit into you Bronco, it will be longer/ less radiator clearance.
Check it out.
Adios, David
