I have 52 AD with 216 3/4 ton 4 speed, I dont know if it is HD or not but I had same problem finding the whole clutch kit and I always got wrong parts. In AutoZone they have 1946 1 TON clutch 10 3/4 inches, only the clutch plate for ~ 50 bucks, 1/8 10 spline. Perfect match for the original.

Rest all was futile tries.

My 2 cents

Ganesh