OK let's try this again.
This is the easy way to do the mod. You cut it and use a piece of flat stock to move it back the needed distance. I can't tell you what that would be. You'd need to get it mocked up and figure that out. Then take it to someone to be welded since you don't have a welder or maybe be able to have it done when the mobile welder is there.
The other way is to cut it and then add a piece of round stock in bent to the distance you need.
This is the easy way to do the mod. You cut it and use a piece of flat stock to move it back the needed distance. I can't tell you what that would be. You'd need to get it mocked up and figure that out. Then take it to someone to be welded since you don't have a welder or maybe be able to have it done when the mobile welder is there.
The other way is to cut it and then add a piece of round stock in bent to the distance you need.