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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
3.167" FROM OUTSIDE TO OUTSIDE OF HOLES IN BOLT PATTERN
2.280" REGISTER FOR CENTER HOLE IN BALANCER
1" Dia shaft w 1/8" keyway
Aeromotive -Hilborn-Enderle-Waterman-DSR-Ron's -Kinsler- Crower - most all pumps with 3/8 hex drive
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