67-69 Barracuda 8.25"

66fs said
383 cars had an 8 3/4. 7 1/4 should be fine, especially if a sure grip. What gears?

not sure about the gear ratio but I thought all A bodies had 7 1/4 until 73? would a modification be possible to turn it into a sure grip? essentially sure grip is Mopars Posi Traction.