Water pump or fan Pulley, All V8, 1 groove, NO AC, used 6" dia stamped & OE# 1231724 FITS: 1965 1966 1967 1968 1969 1970 BUICK motors V8 SKYLARK LESABRE WILDCAT ELECTRA SPECIAL SPORTWAGON GRAN SPORT RIVIERA $50 Plus shipping two available Check out my Website for 100's of Buick GS, GSX ,Skylark & Riviera Used Restoration Parts! WWW.BUICKGSPARTS.COM