Do all flat top knuckles for a D44 have 6 holes in them? All the pictures I've seen have them, but just want to be sure the ones I've got will work before they get machined. I guess I could be more specific... I've got a D44 in my '78. I am looking at buying a D44 out of a '76 1/2 ton with 6 lug wheels. Will that work? Thank you.