Brakes/Coilover advice please

Jim Lusk said

The bolt through the torsion bar socket into the pivot pin (as I have seen it) removes the bushing form the twisting equation. Lots of reasons to NOT do this. You aren't saving much weight. Yes, there is more room for headers and it is easier to tune the suspension with different springs, but it's not hard to change bars, either.

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If you weld up the socket to the arm and use a poly bushing, it'll still rotate on the bushing. Just gotta make sure to support the back end somehow. I've got a thick piece of aluminum bolted to a bracket on the frame. Then where the bolt goes through the thick retaining washer into the pivot shaft, I've got a bronze bushing. The whole thing operates very smoothly and rotates on the poly bushing and the bronze bushing on the back end.