Not commonly known but, there are at least 2 diameters of front anti sway
bar that were fitted on GMC coaches. I think that they were referred to by
the factory as standard vs. heavy duty. Or, early production vs. late
production.
There are some aftermarket bars out there that are larger still, as
well as the steering stabilizers.(that shock absorber looking thing mounted
horizontally on the front steering linkage).
Jim Hupy
Salem, Oregon