You have the belt set up from a 1968 Pontiac Bonneville with 400 engine was replaced 1973 grand ville 455 The water pump shaft is too long and pulleys do not line what?

The problem is that the 1973 Grand Ville 455 water pump shaft is longer than the 1968 Pontiac Bonneville 400 water pump shaft, causing misalignment of the pulleys in the belt drive system. The pulleys aren't lining up because the longer shaft has shifted the pump's position relative to the crankshaft pulley and other components.