Disc Brake conversion problem

[69worktruck]

Hello Board,
I am hoping that someone can help me with a problem I have with my disc brake conversion on my 69 GMC C2500 8 lug.

Here is what I have done. The donor is a 78 C30 Chevy.

Upper and lower ball joints
Tie rods
spindles
rotors
calipers
MC

The upper and lower control arms are the original.

The brakes work good, I assume even better with a 1 ton booster (I kept the original) which I will eventually do.

My problem is that the truck won't align. I have too much positive camber and the shims on the upper control arm have all been removed so I have no more adjustment.

Are there differences in the control arms other than ball joints and bushings? Are the mounting points on the cross member different from 69 to 78? Or?

Any help will be greatly appreciated.

Thanks, Eric