The famous Pontiac vacuum gauge on sale... listed for 61-69 but I don't know what years it really was availble, but at $65 and 2 hours left figured someone might want it!
https://www.ebay.com/itm/1961-1969-Pontiac-2-2Catalina-Ventura-Working-Vacuum-Gauge-only-no-pod-nice/232673647235?hash=item362c6e1a83:g:Jt0AAOSwRCpajcPF&vxp=mtr