The angle iron solution is a great idea. The question about 2" spring hangers---the frame is a 53 or older, so this is just one more feature in opposition to it being a true 54. I have never needed to be concerned about pinion angle, but understand its importance. This
YT Video shows my exact issue. His practice is to attach the new perches in the same position as the original. Is there a reason why this won't be correct ?