For SBC Short Water Pump
Pulley O.D. is 4 5/8 inches.
Measurement from front of pulley to back of pulley is 2 inches.
Measurement from inside back of pulley to the inside of the front (back side of front) is 1 3/4 inches.
Thickness of front is 1/4 inch.
Ribbed portion for belt is 1 inch.
You can use up to a six rib belt.
Measurement from ribbed portion for belt to front is 1 inch.
Holes for fan spacer are 1 1/2 inches center to center.
