I don't know who told you that the bushings on a 3600 spindle didn't have to be reamed but they were wrong. The ½ ton are full floating, are made to size and don’t have to be pressed in this may be what they were thinking of.
After they are pressed in, take the spindles to a auto machine shop and have them hone them to fit the king pins. You can’t ream each bushing separately, they must be line bored with a long hone, most decent shops will have one.
Believe me I went through three weeks of this a couple of weeks ago because I wanted to do it myself, spent hundreds of dollars on reamers and extension guides and never did get it right my self. You really do need a professional hone like a Sunnen. Cost me all of $20 to have both spindles done in the end. If the kingpins were working in the axle eye then you will need to ream the eye and fit an over sized king pin and bushing set.
Denny Graham
Sandwich, IL
