Good question. I don't know....
It looked to me like the bracket was made to fit a number of different trucks. _IF_ I was planning to use the existing frame long term I think I'd approach it a little different.
The bracket I bought is bolted to a bracket that in turn bolted to the frame. I think the best plan would be to remove the original bracket and build my own. Starting from scratch would allow aligning everything correctly.
But my operational problem with the bracket I'm using seems related more to the body shifting as I go around some corners. I don't know that getting things lined up exactly right would solve that problem.
My experience with these trucks is limited, there are a lot of things I have no direct experience with. But when someone asks a question where I have some experience I always try to share what I know to ensure that I'm contributing what I can to the store of knowledge adn the support this community represents.