Kidding about the torch, but not about the setback. My truck has a '70 Monte Carlo front clip. A rather new idea in '76 when installed. Front brackets are welded to MC frame so I can grind off welds and move maximum distance rearward.
I thought the front and rear bumpers were same on Panel Delivery. Is rear on PU fatter? This sounds promising.
I am also serious about grinding two slots in the front of the fenders or fabricating indentations there. I have looked at Briz contour bumper but would prefer a smooth finish as opposed to ribbed.
The apron does give a "finished look. Never had one. Guess the Panel has never been "finished"....lol.