[RJ Sledge]

I think your giving them too much credit....
If they don’t post runner volume on a head that is posted as legal don’t worry about it.
Just be sure that the head you run is exactly the same number listed as a legal head per NHRA....
If it’s a D70E- DA make sure it’s reads the same in blue print spec.

When did a racer set the runner volume that’s listed in”NHRA Approved Products” list ?????
It’s up to NHRA

RJ