You are looking at the crank pulley from a 66 Olds 442 400 V8 with Power Steering, without A/C. My research shows this pulley to be correct for 66 to 67 full size Olds or Cutlass / 442 with 330 400 & 425 with P/S and without A/C. The crank pulley is un-stamped, 2 groove and is 6 3/16 in dia. & 1 ½” deep. Pulley is solid & straight with very light pitting. Freshly bead blasted.