Front end rebuild, kit or pieces?

[swissarmychainsaw]

1975 GMC 1/2 ton.

The front end on this this a complete mess. If you drive on a crack/uneven pavement (like where new asphalt is laid) it wants to wander left and right.

Essentially does not feel safe.

Latest is it all of the sudden started pulling left pretty dramatically, where it tracked straight before.
I'm not driving on the highway anymore!

I just has the frame welded where it cracked at the steering box (the guy had to split one of the tie rod joints -- I believe it was the inner tie rod).

All the grease fittings looked like they have not had grease in years. Does NOT squeak or anything, just kind of wanders when you drive down the road.

It's bad enough that I'm considering just replacing "everything" meaning:

Upper and Lower ball joints
Tie rods
Idler/pitman arms

Questions:
1. should I just fix what is broken?
2. Is it better to get a complete kit,or buy individual parts?
3. And lastly, is this the time to replace the front springs, while I'm in there?

(Brake lines are getting done!)

Pics are here:
http://67-72chevytrucks.com/vboard/s...d.php?t=595899

Thoughts are appreciated by those who have been there!
Nick