422 dyno fail

Fun with numbers!!!
The OP’s combo:
422ci, heads flow 255, cam is a HR, [email protected] with .570 lift.
422/8 = 52.75
255/52.75 = 4.83cfm/ci

A mild street 505 we had here:
505/8 = 63.125
Prepped/blended rpm heads flowed 285
285/63.125 = 4.51cfm/ci
This motor was 9.7cr, and had a smallish HFT cam(232/237-112, .483/.483)
The manifold was an old original Torker and the carb was an old school Holley 850vs, and it was tested with 1-7/8 x 3 headers.

If the OP’s combo is struggling to make 1hp/ci with 4.83cfm/ci...... how hard is it with 4.51cfm/ci?