I will check.
I know that E70-15 Polyglas Blackwall were on '68 Shelby's.
In '69 the Shelby, Boss 302 and 429, and the Hurst/Olds were the first to have the GT designation. The GT designation was used for 60 series tires.
The first use of the RWL tire in an OEM application was the 68 1/2 Cobra Jet Mustang.
Your welcome!!! [img]<<GRAEMLIN_URL>>/
[/img]