This used original crank pulley is marked 1969 340 with air and power steering. 7 inch 1/2 inch belt outer groove. 2 inner grooves are 3/8" belt approximately 7 3/4" diameter. Depth is approximately 3 1/8". Thanks for looking in our store. If you are not sure if this part fits your application, please ask questions. Check out our other great items. Most orders shipped within 72 hours unless I'm away on business. Satisfaction guaranteed or your money back.