WHAT'S THIS G.M. PULLEY FOR?

[BJCHEV396]

Been doing a Spring garage cleaning and came across this water pump pulley.Part number 330556AS.Anyone know what car it's for?Thanks,Bill.

[TDW]

From a post on Team Chevelle

WATER PUMP PULLEYS:
330556 AS 69-70 8 cyl EXC 396/375, 454/450, or EXC fact inst AC
...............71 307, 350, 400, 454/365 EXC AC
...............72 8 cyl EXC AC or 63amp delcotron
...............73-76 305, 307, 350, 400with 61, 63, or 80 amp delcotron

[BJCHEV396]

Thanks Tony.