Flawed theory Mike, IMO.
You are comparing with a full
15 passenger van. OK.
Which is not over GVWR (I'm sure they have an average weight per passenger x 15 to figure the payload).
Put people in the SMB, and gear (winch, bumpers, including the tall and heavily loaded rear box many do) to boot then compare. With the already over GVWR rating.
A lower vehicle will slide sideways easier than a tall vehicle without tipping or rolling.
Neither will slide sideways well - I have pictures to prove the results of my accident in a GMC van.
A slightly wider track will not make up for it fully (but surely help).
My 2x GMC had a wider track than stock - only got me so far...
The SMB center of gravity is not the same as a stock van! No way.
A 4x4 vs the same vehicle in 2x or otherwise stock will always have a higher CG.
I can't believe the denial on this site on over loading and over weighting your (lifted) vehicles.
Its not common sense fellas.
I don't give a shit what carringb says.
CDL drivers more than anyone know the importance of running up to your weight limits.
We are not talking 105,500 here, we are talking one ton vans.
...Vehicle weight plus one ton carrying capacity from a manufacturer designed and approved vehicle.
Carrying capacity is already reduced by the addition of your 4x4 gear to the empty van.
Up rate it, overload it, whatever, its not approved by anyone worth their weight more than a sticker on your door.
Regarding brakes, weight aside, the F450 brake upgrade makes for powerful brakes without the warping associated withe F350/E350 brakes. 17" wheels are needed.
My van brakes powerfully, and controllably (yes F450 brakes). Still, a loaded van (add a trailer?) and you should slow down like a semi.
Brake early and slow down easy (er)!
Semis have a # gage to see how much effort you are putting into your brakes on each stop.
Cheap wheels blow off at the lugs... Don't cheap out on wheels!
Not overloaded! Apprx 8000K + 5000K= 13K +-
Overloading is personal choice.