I have a template to start and trace it to the metal. For tools I used tin snips, hammer, vise, pliers, and the dremel wit a cutting wheel.I cut along the top first. Most are rough cuts as I go along I trim for symetry.
The I cut in from the sides. This is where the pin will be made to go through the frame. The two mor cuts to shape the lower end.
I cut down on the inside. The cross cut is done with a dremel cutting wheel. If you want it to hold pipes you need to cut shorter in length from the top. I do a double bend for the end tabs. Then the fit up to mark where the pins need to be for the brackett to sit. You can see the mark in black.
Bend up after cutting the pins. Finally I use a vise for the final bend toward the center of the car.
Finally I trim the uprights, the sides can be off in thickness. My template is off and I have yet to make an exact pair. I like the fact that I can make them higher than the original.Then a paint job and assembly.