Upgrading Defender to heavy duty

[Andyandlew]

Yes basically. Use 110 unlevelled rears with the helper springs on the back, and if memory serves me right, the fronts on a 3500gvw 110 are HD 90 rears. When I had my 127 it was running 4500gvw single coils on the back with no helpers. I took them off as they where too stiff when unladen and have sat in the garage ever since. On the front of mine I use HD Landrover Discovery rears + 2" due to the Perkins Phaser. As previously mentioned make sure all the bushes are in good order and gas shocks on the back are a sound investment.