1985 D150 "Mr. Curtis" race truck with a 2015 6.4

After hours of taking measurements and doing calculations (simple stuff) i figure i might have a way to make it fit, IF the spring perches are lining up close enough.
Failed to check if they do... and it's not too easy for me to decide what's good and what is not good alignment:

The Dodge Van lca fits no problem and it's spring perch is 1/2" further outboard. But the 1500s lcas spring perch is another inch outboard.
That's no problem with the 1500s frame because the upper spring perch is attached to the frame at an angle. On the D150s frame it's almost at a right angle to the floor.


I will have to make custom mounts for the LCAs and the UCAs, but i end up with about the same track width i have in the rear: 68" with 55mm offset wheels (2.83" backspacing, provided i understood backspacing correctly).
The bad thing is, i just cut my jig apart. Yay.