I installed a Patrick's AD truck front sway bar on my 37 Chevy PU.The springs are the same with the apart as the 48-55 trucks,Art Deco the same too.The bar bolts on ,need to drill a few holes in the front cross members,fidgit around a little,no big deal at all if you're handy at making stuff work..Instead of the sway bar end brackets bolting on the front set of U bolts,use the rear u bolts on the front axle,it lines up ok.
The Patrick's type sway bar is much stiffer than the factory Suburban bar,and I think it's better.
GMC's have a different shaped front crossmember,it angled up,so you need to weld up brackets or build up spacers from aluminum or steel.
I also added a rear Panhard rod,usually not used on leaf spring suspensions.But these old trucks have narrow leaf springs and not the best shackle set up,the bar keeps it from wiggling around in back if you actually drive fast arounfd corners,fast for an old truck anyways.
