422 dyno fail

Weighed on a calibrated scale at work.
A truck scale .
I can't remember if it was digital ?
I think it was but that was in the 90's

70-72 Dusters are light. No roll up rear 1/4 window mechanism, plastic grille and turn signal housings, not much bright work trim, no door window vents, no front/rear valences, plastic tail light housings w/o die cast bright trim