I think the 1/2 ton tie rod ends have a straight shaft, the 3/4 ton ends may be tapered, allowing use of modern ends. They are tapered on later models.

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"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."

1957 GMC 150