A 216 in 52 could have had the heavy duty 10-3/4 clutch from factory in a 1 ton truck (I have many of this exact configuration)
And that flywheel and pressure plate measure exactly 11 inches across so you could swap out the clutch disc with the fancy new big boy 1954 11 inch disk that actually gave you that extra 1/8 on the radius for a full 11 inches across without changing any other parts.
-s
