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Thumbnail Filmstrip of 947 Belt Drive- Un-Blown BB Chevy some LS Belt Drive Mandrel 1" dia 1/8" keyway w spacers 6" Images
IW-947 Big Block Chevy Innovators West 1" Drive mandrel w 1/8" keyway and spacers for various pulleys Shaft is 5" long 6" long overall
Billet Aluminum- has a 2.280" Center Register - fits many GM engines with 3 bolt pattern on Balancer
Works Great for Turbo SB Fords using mechanical pumps , 1" Dia shaft w 1/8" keyway
Aeromotive -Hilborn-Enderle-Waterman-DSR-Ron's -Kinsler- Crower - most all pumps with 3/8 hex drive