Anyone know if a 72 Duster K member will fit in a 74

Would that failure cause the engine to drop down on drivers side where the headers are resting on the steering column and cause alignment issues.
absofrigginlutely! BTW I've seen that k frame advertised on fabo for $75-100. When I have them I get $150-$200 sandblasted and painted. I have repaired them also. I have a welding guy who cuts a piece out of a 6cyl k frame and splices it in.