My father just restored a 1968 mustang.. Midnight blue with 351 cleveland.
Any ways he mentioned to me that he wanted to get a chrome emblem for the back fender that looked like this
The base '70 Cougar came with no engine callouts and I thought it deserved one. I got mine at Tony Branda, but that was many years ago. The link above is from http://www.cobraspares.com/badges.htm a UK Cobra vendor.