X2 on the Bilstein shocks. I have a '65 and like Vektro, I've installed the same GS springs, the Bilstein shocks, larger front sway bar, and Lares (sp?) steering box. Just received Tom Telesco's rear sway bar today but have yet to install it. Anyway, my Riv drives, rides, and handles so much better with the upgrades. Thinking back, I'd say the Bilsteins made the biggest improvement.