Don't forget that center on an 8 inch rim would be using 4 inch backspacing.
If you wanted wider tires to be able to put maximum grip to the ground and to be able to handle the massive amounts of power these trucklets put out AND want to be able to 'dub' your vehicle, I guess a more then centered backspacing might be do-able.
That way the outter edge of your tire will still be able to be stuffed inside the wheel well. I'd be carefull though, too much backspacing might rub on the a-arms.
