Front suspension suggestions for better tracking

Once again I turn to the wisdom of you guys with years of experience.

I finally have my car *almost* the way I want it. I swapped out the auto for a Tremec TKX 5 speed, I have a new rear end with a powr-lock differential and Hotchkiss subframe connectors. Previously, I had added Borgeson power steering. The car handles really well now but the tracking could be better. My shop gave me as much positve caster as they could, about 3.5 degrees.
What would be the next step to help improve drivability? I have Q1A adjustable upper A arms but the rest of my front suspension is stock. Stock torsion bars, stock anti-sway bar, poly bushings, good shocks.

Would adjustable strut rods be my next step to help increase caster?
Try changing the idler arm