Polyurethane or Rubber

Definitely a good move going with 1.03" torsion bars... I have 1" bars I bought back when Just Suspension sold them and they were a huge improvement over the stock 318 bars and that was back when I had 15" Rallyes with 60-series tires. Now I'm looking to step up to like a 1.14" from the massive grip of my recent wheel/tire upgrade.

I also agree on keeping most of the front end bushings rubber for your intended purpose. Poly and others are great, I have poly LCA bushings on my car but like others said they kind of need the adjustable strut rods to work the best. The rest of the suspension isn't going to be pushed hard enough either to notice a difference with polyurethane bushings IMO.