1987 Chevy full size Blazer K5 - steering/front end issue?

[Woogeroo]

This is from a pal of mine with a 1987 Chevy full size Blazer K5.

It has 38" swampers, suspension lift, etc..

-W

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I'm outta ideas.

Took my front end nearly apart yesterday.

Ball joints can't be budged with a 6 foot iron bar and a guy strong enough to rip the tires off my truck.

Wheel bearings have zero play, no chips and plenty of grease.

Hubs are working properly (one side not stuck locked in)

Tie rod ends are solid.

No excess play in the steering wheel, none in the shaft knuckle or the rag joint.

New steering box has no play and no leaks.

Tie rods/drag links between New pitman arm and re-curve arm are good, no play.

New p/s pump has no play and no leaks.

Brakes are still almost new and working fine. Rotors not scored or warped, pistons operating normally.

Tires all have 28 lbs of air.



The Issue:


But still RANDOMLY and OCCASIONALLY, it tugs slightly right...
and still RANDOMLY and OCCASIONALLY (altho becoming more often), when you turn right, it doesn't want to come out of the right hand turn.

When it does come out of it, it jerks/over steers to the left.

Most of the time it goes down the road straight and stops straight.


My steering set- up isn't all that common but it's pretty simple: