Single groove. Fits 1965-1966 Ford small block 289.
Fits 1969-85 Chevy SB Small Block Black Steel Water Pump Pulley Long (1 Groove)
Single Groove Black Steel Water Pump Pulley for 1965-69 SBF 260 289 302 351W V8
Fits 1969-85 Chevy SB Small Block Black Steel Water Pump Pulley Long (2 Groove)
For 1955-68 Chevy Small Block Edp Black Steel Water Pump Pulley Short (1 Groove)
For SB Ford 260 289 1965-1967 V8 1 Groove Black Steel Water Pump & Crank Pulley