My thought would be to use pieces of 1/2" plate, sized as best as possible, to use as spacers. Then you don't have to move the formed section of frame, just make it flat. Of course a steering box brace would have to be custom built or modified.Not really. Seems like that would be a tricky deal with the steering box wanting the lumpy shape to mount.
Just a thought as I did this on the '68 frame that's under my '70. It never had the dimples in the frame at the box, just a factory reinforcement section. It was manual steering and I swapped to power.
But this idea may be more work than cutting the dimple section out and moving it forward.



