Ive bought some aftermarket rear spring hanger for the front springs. After I removed the old hangers, I found out the new hanger would not fit though the hole. I didnt want to drag out the torch again, so I took a piece of scarp steel to make a jig for a hole-saw.
I used a set of transfer punches and center-punched though two holes of the old hanger. I then bolted the old hanger to the piece of metal and installed a bushing and sleeve. I then used a transfer punch to center-punched the pilot hole.