I haven't seen a stock Vega arm (if that's what you're useing) in so long I can't recall if it's tapered, but the aftermarket ones I've used had a non-tapered hole and the tie rod end fit fully through (though tight).

I'm not sure if you're also asking about getting the pitman arm off. There is a tool to do that, but if you've got a gear puller you can use a strap clamp on the arms (so they don't spread when you turn the screw) and get the same results.

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