Point me to parts & rebuild kits etc.? '66 Signet /6

Keep in mind that you don't need poly bushings to have a firm suspension.

Good shocks in conjunction with larger torsion bars work great in my Swinger and don't rattle my teeth. VERY controlled ride and handling. Bilstein shocks, .890 torsion bars, 2" drop, and all rubber bushings except for poly strut rod bushings. If I had to do it all over again, I'd go with 1"+ torsion bars.

Good luck!