What steering pulleys were available from the factory?
Marco (Monzabudd) explains: “Today I found out that not all V8 Monza power steering pump pulleys are the same. there is a 5 1/2″ unit and a 6 1/4” inch unit, both factory. The smaller came on V8 No-Air cars and the bigger from V8s with Air. And as you probably know the bigger pulley will turn the pump slower resulting in less drag on the engine at all speeds, and possibly even helping take some of the lightness from the factory power steering on cars without air cond.