I did this to my 2.5 n/a made a big difference and easy to do, all just bolts on.
obviously you'd need to source some bits from a v8
http://www.landyzone.co.uk/lz/f7/retrofit-pas-103255.html
i have a bulkhead that is off the landy for refurbing with everything still attached, and i have a hose for windscreen washer through passenger side and a lead that goes to the heater fan. if you want a pic pm me and i will email it you.