Anyone have old Direct Connection or Mopar Performance books or articles?

My understanding is , it was used on 426 hemi motors
and on some six pack motors , and that it was a racing
type crankshaft, being full radius made the crank stronger
and less likely to snap at the rod journals. Please note that
the drawing is not to scale or 100% accurate. LOL
It is just to give you the basic idea and difference between
a full radius crank and a undercut radius crank.

Cheers.