Control arm/Suspension

[67Monster]

Been sitting on a bunch of parts for a year now, but finally got my "New" 6.0 and 4L80. Got the itch to get it going so I can be driving it instead of dreaming.

Here's the scenario:

1968 C10

1987 crossmember JB3 LD

HD CPP drop spindles 2" 87 HD
1" drop coils
Polygraphite rebuild kit "performance" for 87 LD
^ New tie rod ends and steering components for 87 LD
^ New upper and lower ball joints for 87 LD
Have JB5 inner/outer bearings and HD hub rotor

Took the entire crossmember apart. Plan on using 87 LD arms out.
After lots and lots of reading, I'm still at a loss. Pretty sure I will have to get HD ball joints, but what else? If I get a reman set of HD calipers, will there be issues mounting?

Anything I'm missing?

Thanks

[67Monster]

Drop spindles are CPP CP4S2