You are right on that dick1172762, the early mustangs two did use the pinto four speeds on the 2.3 , and later went slowly to the I think RUG trans , like the pintos mustangs C-4 to the C-3's , I remember because of all the clutch's I changed when parents brought their kids a car for high school , most if not all including the parents did not know how to drive a standard trans , yep , nothing like the smell of burnt clutchs and clutch dust to make your day, at least back then the ford dealer I worked for was not a greedy as the ones today ,