Bull, I think that is a doable project, but you need to tackle one kink at a time, with some patience and the right tools. Do you have a sheet metal hammer and/or a decent body hammer and dolly (with a flat side and a square edge)
Also very helpful are some sheet metal tongs. Here are pics of two pair I use for cleaning up dinged up box edges and the more important pair are the pair with red handles, and welded on angles. I made that pair from a destroyed set of nippers.
the pics shoe before and after on the mangled edges and all I really had to do was squeeze the mangled parts hard with the bull grips I made.
The roller I can also help you with. I have that exact same roller setup in my '54 craftsman 5 drawer roller. (very probably made by the same company) So I know what they are supposed to be doing, and it is not obvious. The rollers can be replaced with a set of modern roller bearings. If like mine, 1" in Diameter and the middle hole appropriately sized for a bolt. More on that later, lets get the metal straight first.
Tool check!