Our 1964 Skyhawk has a placard by the fuel cap indicating that it is
approved for unleaded auto fuel. However, I don't have any paperwork
showing that it has an STC for autofuel. Any ideas on how I could
research this information? Or...is the placard all I need?

Thanks.

--
Al Gilson
Spokane, WA USA
1970 VW Convertible
1964 Cessna Skyhawk