From what I can see your pulley on the WP the depth of that puts both grooves too far to the rear.
You need to change the WP pulley to one that the 2 grooves are not as far rearwards.
You may need to get another double pulley for your crankshaft, perhaps one from a 63 or 64 Pontiac V8 engine.That may reach out more towards the radiator.
The other groove would be for the alternator. It could be because you have the 4 bolt WP. I know there are 8 bolt Water pumps but those fit a newer timing cover. Perhaps the 8 bolt WP reaches closer to the radiator?
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Peter Serio
Owner, Precision Pontiac
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