hey there, this might sound stupid but give the threads a good clean with a wire brush, then if you have gas bottles available put a bit of heat on the nut. when it is warm work the nut back and forth to get it moving, do this the whole way off.
Hope this of some benifit to you. I am thinking of fitting the same kit to mine so am intersted to hear what you think of the setup.
Thanks for the reply Silver, and your suggestion is NOT stupid at all, exactly what I was going to do. I cleaned the thread with wire brush then I used a small hammer to to tap it slowly - a few times, this worked and the nut came off quite easily.
I am working on getting an agency setup for the Ironman suspension and will soon carry a stock, let me know if you afre interested.
I only managed to do the rear today as I was investigating a diesel leak and also cleaned and treated the rusted areas, front will be done tomorrow.
12, 14 , 19mm mm sockets + spanners, breaker bar, ratchet handle, heavy duty trolley jack and axle stands.
Quite easy to do yourself, this is how I did it:
Secure front wheels to stop from rolling, loosen rear wheels nuts, jack up the rear axle (at diff) and place stands under chassis rails, remove rear wheels, disconnect anti roll bar from drop links, remove brake line securing bold in the centre of the axle, remove axle breather pipe, then remove both lower shock mount nuts and push shock off the bottom mounting, now lower the jack slowly to drop the axle KEEP AN EYE ON BRAKE HOSE ETC, lower the jack fully and the springs will come down with the axle, pull out both coil springs (very easy), now remove top shock mount nuts and remove shocks,
REFIT IN REVERSE ORDER: affix new shock and bushes at top mount, insert new coil springs (make sure the longer spring is fitted to the driver side), raise the axle, affix lower shock mounting and new bushes, refit axle breather pipe and brake line onto the axle, reconnect anti roll bar to drop links, CHECK EVEYTHING, fit wheels and remove axle stands, lower vehicle and remove jack. DONE
Pictures which might be helpful to anyone wanting to do it themselves: