Looking at the uncorrected numbers.......
It doesn’t look like a bad weather day at all....... barely over 5%CF.
I mention this to point out that the air wasn’t horrible, so it wasn’t causing the uncorrected numbers to be abnormally low.

660ft/lb from a 572 is pretty soft.

We had an EZ headed 580 on the dyno here a few moths ago.
The uncorrected TQ was almost 100ft/lb better.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads