[Accelo]

Looks like your w/p and crank pulley line up. Their are several different offset pulley's for the alternator. You may also be able to add a spacer behind the one you have. However you may run out of threads. Some of the factory pulleys are recessed on the end for this very reason.
The valve covers are likely the same height but the corners are rounded more. I was thinking this may be the difference?

Note: The upper alternator brace bolts to the rear of the alternator.