Cosmo,
I do not drive my trucks faster than 60 mph (at least on turns that might benefit from a sway bar).
I think that all 1/2 Advance Design Panels and Suburbans had the front "stabilizer" (sway bar). AS you have most likely seen in previous threads on this topics, there were two styles of Advance Design sway bars.
It looks like the Canopy Express and the 3800 (1 ton) Panel did not have stock sway bars.
I notice a slight improvement in turns in my Suburban in comparison to my Pickup (both 1954 1/2 ton with new springs, bearings, and comparable play in the steering). However, I have no noticeable problems in turns/curves when my Suburban is fully loaded (8 adults).
The 1/2 ton truck axle's dimensions are different from the larger trucks - maybe someone has tried the stock front stabilizer or the after-market front stabilzer on trucks larger than 1/2 ton.
Tim
