King Coil Springs

I went for the lift as well...worked a treat for my Simpson Desert Crossing in 2011 and Cape York Old Tele Track trip this year. Heading to the Canning Stock Route in 2013 so it will be tested yet again.

The only thing I'd say i that it does give you a much firmer ride that the standard set up

Hi Bill B,
we use to have Polyairs on our Landy for number of years. We were very happy with them. Only think is, you must remember to put air before loading vehicle or hooking tow.
Now we have Bellow bags installed by Heasmen Stearing. We have leaf springs on back of Troopy, and they are equally very good.
Cheers Dana
Ps: some info here:

Polyairs

Hi Bill. Had a 120 Prado for 7+ years with Firestone airbags in STANDARD springs. You can't beat the ride from original and the airbags are not noticiable exept for holding the weight. My towball weight is up at maximum when towing plus a fridge and whatever in the rear. Never needed to go above 10lb in the airbags and 5lb unloaded. Try them first before changing the springs. I think you will be pleasantly surprised. I now have a 150 with the Firestones as well. Just completed 4000km of towing without any hassles. The air pressure lasts many months if they are fitted correctly. You can get them from USA for around half Aus price. Cheers,Bob.

Thanks to all,
I really appreciate all the ideas and experiences submitted.

I will be going down the Poly Road. Only thing to do now is to replace the shocks.

Thanks

bill