an 8.5" rim with 3.5" backspace is -1.25" offset. to use that wheel you'll need to probably make the rear end more like 54-55" drum-face-to-drum face. if you're looking for potentially less expensive alternative, starting with a ford ranger 8.8" out of a 2002-2011 FX4 gets you 31 spline axles, likely a 4.10 limited slip, and if you can find 2 right hand axles in a junkyard, (the pumpkin is offset 1.5", so the RH axle is 3" shorter than the LH), you can narrow 1 side and you'll end up with a rear that is 55.5" wheel mount to wheel mount.
