'73+ Big bumpers- any attempts to change the look?

The only way is to remove the shock absorbers the current bumpers are mounted to to go to 73 brackets
So the easy thing to do is to drill the shocks and remove all the fluid then with bumper still on
Then push it as far back as wanted and may even be able to remove the reenforment brackets and get that much more ability to push it back
After in desired location weld the shocks in desired position and your done