I recently replaced everything except tie rods which were good and my SD steers like new. I had to put it on the alignment machine twice before they got it good enough. It is difficult for those chain places to get things right, the local indy doesn't have a machine and the stealer is an hr away and I don't like them.

See whether they will push on the tires and measure the effect on toe. None of these places have a spreader bar. I've read some say it isn't needed. Others swear it is. I've thought of fabbing one from one of the bars used to secure loads in a truck but don't know that the shop could be made to use it. They think an owner by definition knows nothing even though they are the ones working for slightly more than minimum wage.

The 1st settings would cause wear. The after settings look better. I can't comment on springs. I didn't change mine but am only at 250,000 and your mileage is more. Does the alignment shop guarantee that your tires won't wear?

A brake pull is frequently the front brake system opposite the the pull. ie pulls right, suspect something keeping left caliper from braking as much as the right. Are the pads worn evenly?

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.