Welcome!
I joined this site the middle of last year, and I can tell you it contains lots of great information and really helpful people that have a wealth of experience.
I have a book at home that gives production figures for early a bodies, but I'm on the road this week. I did a quick google search and the pdf that came up shows 2,578 65 Signet Convertibles. I posted the link below. I think the book I have at home breaks the production numbers down further to show convertibles with 225/6 and those with 273v8. Nice ride!
https://www.google.com/url?sa=t&sou...FjAAegQIERAB&usg=AOvVaw11gvb4mEXqETItXxN4lZrb