Generally, the pulleys aren't balanced as part of the rotating assembly. I've had several engines balanced over the years, and never did the shop allow me to include the pulleys..
. They balance the internals, and then balance the damper and flywheel.
Gary W / 09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe, '70 Mach I
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan