Bumper bracket mounting questions

[Jonlopes]

One of the first mods I want to do with my truck is replace the step bumper with a normal chrome “Sport” bumper. I think they look better and it will allow the longhorn to fit in the garage a little easier. Unfortunately when I crawled under the truck I found the PO both bolted and welded the brackets to the frame:




He also welded a piece of angle iron to the ends of the frame rails



And to the angle iron he welded a pretty heavy duty bracket that goes to the towing receiver.



So I have a few questions for the experts:

First; I was thinking it would be fairly easy to remove the welds with an angle grinder. Is this a good idea or should I just go to a weld shop and have it unwelded correctly?

Second; would I need to remove the angle iron brace or can I leave it in place? Or in other words can I mount the bumper brackets to the outside of the frame?

Third does anyone have any pictures of how the brackets go on a long bed leaf spring truck?

Thanks!