Body roll?

[GMC-YA68]

Need some input.

New 2.5 lift (all spring) with extended pitman arm (additional drop)
New poly body mounts / transmission / transfer case mounts
New tie rod ends / drag link ends
New wheel bearings / new upper and lower ball joints.
New close range steering box from RedHead. 15:1 ratio
New intermediate shaft. New U-joint and rag joint.
Hydroboost set up using the flow control valve from factory power steering pump.
Alignment looks good and camber / caster looks good by just using a 3' level.

I am having a horrible time keeping this thing pointed forward. A small bump in the road causes this thing to dip / dive / steer any way it wants which leads me to swaying all over and I go back and forth like a rally car driver on the steering wheel just in order to keep the thing in my lane. It is not safe. Even letting off the gas at a normal cruising speed causes it to do all this. It is NOT death wobble. Everything up front is brand new and tight.

Even swapped the steering box out with a 18:1 from RedHead and still doing the same thing.

Any ideas?