That's basically the idea on a split. mine in the picture is about 4 inches wider than the stock ltz frame.
the angle of the front suspension creates caster, which helps reduce steering effort and lends itself to self-centering. it also relives rearward stress on the a-arms in the rough stuff.
most buggies have about 9 degrees of caster built into then with an upslope of the front frame.
since the rear end is direct live axle you get a lot of "push" in corners. going wider up front helps overcome that and also makes for a more stable platform.
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