Is there a dyno attached we cannot see in the picture?

I wonder what percent over operating pressure it was tested to?

If it passed the WT did they then run the Hemi up to rated TQ and HP in stages?

Remember the scandal about “hammering” the new Gen III 5.7 Hemi on the company dynos to loosen the rings so that an advertising claim of “one horsepower per cubic inch” could be made as planned? Toyota, GM, Ford and Nissan all claimed their dyno tests showed 20 less HP than 345 HP that Chrysler claimed. SAE revised their official dyno test rules afterwards.