Ya I'm totally being out of the loop here cuz I can't view the pictures...
If you're talking about the front hanger for the rear springs conflicting with the body mount behind the door...
My '76 has that body mount inside the frame instead of outside like the newer ones I've seen at junkyards. You could probably swap everything over from an older truck at a junkyard because I doubt they changed things all that much. The way mine is set up made it super easy to move the hanger forward 5.5". Barely had to even drill any holes.
Otherwise, I'd try grafting the two together and adding a crossmember like the '76s had if yours doesn't already have one.