Looking for X Head Picture

I have heard the old stocker guys would buy EVERY head they could get their hands on and start testing. Some were just better, some were horrible. IIRC, they ended up which a bunch of “crappy” heads in the end not knowing what to do with them.
The son of Tim Ekstrand that won a couple of NHRA stock class National Championships with a 360 Duster with Bob Lambeck said Chrysler would send them 100's of stamped rocker arms. They would pick out the thickest ones and the ones that had the most ratio. Send the rest back for common replacement parts

Also, there are "good" castings that are sent to select racers. I've seen reference to that in the Chrysler interoffice memo's I have between Bob Tarozzi and Tom Hoover.