Offset spring kits???

You wasted your time notching the rail for the nut. You can put the hanger flush against the rail. You just need to enlarge the hole on the inside of the rail . Mount the hanger with out the spring using the four studs holding it against the rail. Then put the spring in place and install the bolt through the enlarged hole on the inner side of the rail Then put the nut on the outside of the hanger. The large bolt will also hold the hanger against the rail if you do not enlarger the outer hole in the rail.

The nuts that are welded on the off set brackets were a factory screw up. But it would have cost to much to recall them after it was discovered. Wth the nuts rewelded on the outside It was a slip in and drill one hole app. Slide your factiory hangers in and see for yourself. No brainer. My duster was notched for the off sets. Now I have to fix the slots they cut in the rail. I will use the large bolt to hold the to inside of the hanger to the outside of the rail. If some don't understand what I am saying I can take some pics.

Remember to check the hangers to make sure they are square with the chassis. These mounts on the car are not always square and make for a uneven axle location. I had to move my spring on my one car back 1/2 inch on the pass. side. using longer studs and a spacer. I could the line lock the car and it would stay straight in the smoke box without turning the wheel. Before making this adjustment it would always want to spin around doing a burnout. Using the holes on the bottom of the rail and comparing from side to side you can visually see if one side is back farther then the other if its a big difference. It is very rare to see a perfect body. Unless they were Race "bodies in white" from mopar