Tronman, This SEAL might be what you are looking for. The last pic attached to the ad is snagged and displayed below to show the vehicle application info which seems to match your 1965 C60 info.
Yes/No/Maybe So???
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)