wheel spacers n 4 inch shackles by the look of the pics, gearing has to be low, trying to turn big tyres on stock xfer and diff gears is a BIG task.. anything above a 29" really requires some kind of reduction.. with the xfer in L4(1litre), and in 1st I can get out and slowly walk beside mine(on 31's) while it(1.3lit.) idles along, I want it to be fractionally slower thou, going up a tyre size(33's) im likely to have to replace diff gears with something more highway orientated, but then lower the xfer again to either a 4.9:1 or a 6.5:1 IIRC its currently spinning 3.7:1.. dont quote me on that but im 80% sure its around those..