I'm putting the external parts on a reubulit Ford 250 6 cylinder engine that belongs in my 1971 SV200 (might have come from a pickup). It appears the pulley for the fan doesn't line up with the pulleys on the crankshaft. I'm wondering if there's a special pulley for the crankshaft or some sort of spacers. The fan pulley is too far forward to line up with the engine pulley. I've got an owner's manual, but the picture is too dark to see the detail.