mahalo John, I looked up the Patent # and it comes out to a date filed for in 73 and approved in 74.
http://patft.uspto.gov/netacgi/nph-Parse...p;l=50&s1=3,826,538.PN.&OS=PN/3,826,538&RS=PN/3,826,538
He might have meant 75/76 instead of 65/66 as like most of use he is up there in years. Still they would work for me as they would go on one of two different cars a 67 or 68.