Tom, you are welcome to come and measure after the lockdown on my ’63 if you haven’t got the information before that date. Until then (and you might have this already): ·         As I understand it, below are the part numbers. Is there a cross reference list from year to yearsomewhere? There isn’t any number for the bushing separately (as expected). 1965 Riviera From the BUICK CHASSIS AND BODY ILLUSTRATION AND GENERAL INFORMATION CATALOG MODELS 1940 TO 1970 INC