LCA torque

Properly cared for poly bushings will both outperform and outlast the OE rubber bushings. But you have to keep them lubricated, otherwise they’ll dry out and fail. No different than running a ball joint out of grease, it’s not a problem with the part it’s a problem with the maintenance.

As for the torque question, I would want those LCA pivot nuts pretty darn tight. I can understand not being able to torque them completely to the spec since it’s really high, but I would not want those moving around at all. Last thing you want is for the pivots to move and tear the tube out of the K frame. The factory spot welds for those tubes are pretty small