What is the stock rear end gear ratio of my 1979 mustang 2.3 turbo 4 cylinder with a 4 speed manual transmission?

Answer 1

Have you looked on the third member to see if there's a little metal tag on one of the bolts. They used to put the # of teeth for both gears on that tag. My old Fords always had the tags. I don't know if the newer stuff has anything there or not.