I have rebushed my Case 60 front end loader as the bushings and pins were either worn or undersize bolts had been put in place of many of them and the bushings were pretty messed up, even worn all of the way through the side of the steel bushings. So I took an angle grinder and ground the part sticking up above the steel down, and used a magnetic drill and annular cutter (hollow drill bit) to drill out the hole to the size that I wanted. Mine were either 3/4" pins fitting into 3/4" inside x 1 1/4 outside DOM tubing. To use that pin size, you have to spin the rod in a drill or drill press, and take some 400 grit emory cloth and buff the outside until it has 3 or so thousands clearance inside the DOM tubing. My pin material I made from L1214 steel rod that I bought from a steel supplier, and the steel DOM tubing was mild steel.
I put a "top" on the rod by taking a shaft collar and welding it at the end.
Also, if you have a steel frame with two bushings, and something that normally fits in between, then it's best to weld in a longer section of pipe across the whole span, rather than two cut off bushings, because it is not easy to keep two separately welded in bushings in alignment with each other. Once you have them welded in place, then cut out the part in the middle where the other part goes.
Also, I have bought some reamers that I can use to take a few hundreths out of the inside of tubing. The longer ones are called bridge reamers, and you can find them on eBay at times up to several feet long. One last thing is to consider putting in grease zerks. Just drill a 13/64 hole, thread the hold to be 1/4x27, and screw the zerk in. This will greatly extend the life of the bushig and pin.