Thanks for the Speedway suggestion.
These look interesting. They're 7 degree taper studs and the same 1/2-20 thread on the end, but the question is the diameter of the taper right next to the threads. Looks like it might be 5/8-inch diameter, but not shown. That would allow the steering arms to be reamed to fit the taper. The rod threads are smaller though, so the original tie rod would have to be turned down and rethreaded to match. They also have an extended length one that's closer to the ones I bought.
I'll need to do a bit more investigation.
