friendermine has wontons with a 3.5" and 38.5"sx's
you wont like stock coils,mucho too soft. especially with the wider axles there is more leverage put on them when simply flexing, and they will bottom out long before you want them to.
whenever i see some used aftermarket 2 or 3" coils i jump on em and save em. swap em in the rig and see how i like them
my faves so far are 3" tomkens, but they still coulda been stiffer
some no name 2" coil are a close second
rustys 3" suck a nut
stock with spacers sucks
and I have a pair of some BEASTLY thick 2" coils i cant wait to try out.
and i think i might take some 4.5" coils and cut a couple rings outta them and try that out.