That would work for a 10.50 or a 12.50 tire. But it will stick the tires out farther. Just be sure of your local laws. 3.75 bs would prevent any rubbing on the front lca's with a 12.50 tire especially if you don't have an adjustable track bar to recenter the axle after a lift. But for a 10.50 tire 4.25 would be better.
OME suspension, some JKS stuff, 33x12.50 Goodyear MTR's w/Kevlar, 15x8 Pacer wheels, thedirtworx rear tire carrier