I've got the 1966 (?) Hot Rod magazine with the cammer on the front, exhaust manifolds glowing red. I'll dig it out and give some quotes.

I remember reading about Chrysler trying to go OHC and having an OHC hemi in testing--running it up with a big electric motor for testing. Something in the valve train broke at 6800 RPM. Then NASCAR pulled the plug on OHC and that was the end for the Hemi OHC and probably the beginning of the end for the Ford.

More later, after I get the "Wayback" machine started.....