is it necessary???

G'day Rolande and Adrian
I still haven't done anything about caster bushes on my truck as yet. It handles "okay" but could be better. The slight wallowing I seem to experience at speed could be either the bushes or just the Konis needing replacement/rebuilding (they've had an oily film on them for a couple of years).
I certainly don't think you'll need to go that far with a 50 to 60mm lift. Mine sits 75mm above standard both front and back, but the Lovells springs are actually 4" front and 5" rear.
IMHO the "packages" you are likely to get from ARB, TJM or Opposite Lock etc are all over-priced. You'd be better off buying springs from Lovells or Kings and then getting a set of good shockers. These would be Konis or Bilsteins etc. I also like the idea of the Tough Dog Ralphs and OME LTRs, but too exy for me at this stage.
Of course the "big" companies will tell you that you MUST buy matched springs and shocks from them otherwise your truck will be totally stuffed....but that's what their sales people get paid to say....don't be fooled into following their sales pitch.
Unfortunately, with suspension and a lot of other expensive stuff for 4x4s, you can't ask them to fit a set and let you have a drive for an hour; then go and get a different set fitted. So you're left with trying to work out for yourself what will be the best thing for your particular needs.
The only other thing I can say is "GOOD LUCK". :-)

thanks for that guys.

thanks rick, alltrac are near by, i'll give them a call.

thanks truckster, would you go medium or heavy on the springs, towing a camper, 120 ball weight, all up around 1000 kilo plus passengers and other stuff in rear of vehicle, but i don't want the vehicle bouncing around the place when unladen, your thoughts??