On the PS pulley the fonts are different in the numbers and on the back there are manufacturing marks on the original that AREN'T on the repops.
Similar markings on the back of the 458DA smog pulley also.
See pics
Original
Repop
Original
Repop
__________________
Rick
69 Chevelle SS396 Silver L78 M21 Post Sedan (Berger Chev.)
69 Chevelle SS396 Black L78 4-speed 4.10 Post Sedan
Don't text and drive.
Somebody's life may depend on it!