I'm not 100% sure what year these went into production but based on the part number this is a later build 455 Water Pump Pulley. Correct dimensions for 1971 & 72 Engines with A/C and/or Stage 1 option. (Designed to work with the longer water pumps) It's been cleaned, blasted and Painted Chassis Black Part Number 1247885 $35.00 plus exact shipping to your address IF anyone knows the exact year this Pulley was in production please let me know! Thanks! I accept Pay Pal and all major Credit Cards. Order by phone by calling (715) 874-6037 Shop Hours Monday - Friday 1 pm to 6 pm Central time. Thanks for Looking, Best Fastener Collection in the country for 1970 - 1972 Buick GS, GSX & Skylark! And Made in the USA. Don't like dealing with the Big Name Retailers? Give me a shout. I'll be happy to help and share 30 + years of experience in Racing & Restoring Buick Muscle Cars. Check out my New Website for 100's of Buick GS, GSX & Skylark Restoration Parts! I now have an OEM Page as well with 100's of parts to be added as time permits! www.Stage1Restoration.com