Advice Needed Drag Racing w/ Cragar SS

............My fronts are, but the backs weren't available with the shank style.

I never ran the conical lug nuts other than with street wheels/tires. Maybe the contact area provides more than enough clamp load for them.
I still have my old Cragars in the shed taking up space, Lol. I also had some uni-lugs on my car for a time.

CragarWheel1.gif CragarWheel2.gif