For your applications the prices we would quote are as follows:
For a SWB Land Rover Series II or III vehicle, we offer a two-leaf front and a three-leaf rear spring (true three leaf spring not a 2+1 spring with a loose helper) - £320.00. The kit includes the springs (handed and clearly marked Off side and Near side), "U" bolts + nuts, eye bolts + nuts and rubber to metal bonded bushes (standard Landrover sizes). In some instances the leaning issues comes from springs not being handed. The load capacity for the two leaf fronts is 930kg per axle and for our three leaf rears is 1190kgs per axle. We do not recommend fitting two leaf front and two leaf rear springs since in our experience they have caused problems if any reasonable load is carried in the back of the vehicle. In our experience with a standard set up these springs should not raise the vehicle more than 1" at most.
Our packages are available ex stock and are quoted inclusive of UK VAT (at 20%) and include 2-3 day carrier delivery to addresses in England.
If you compare like with like then I think you will find our pricing for Land Rover parabolic springs to be the very competitive, but if you want to give us a ring then we can discuss any other issues you may want to bring up.
For your information we do not sell shock absorbers but we would offer the following advice:- If your driving is mainly on Highway with the occasional sorties off road, but even then the off road work is at slow speeds over relatively minor undulations we believe you can get away with using ordinary shock absorbers.
The longer stroking shocks on the market are required for applications where the increased articulation possible through parabolic springs comes into play. Then it is possible that you can over stroke the standard shock and hence the need for a longer stoking shock.
Re the bigger bore shocks available. Here you only need the bigger bore for when the shock is being excited rapidly i.e.. Belgian Pave type work. That is in a normal size shock bore the oil starts to heat up when being excited in this way and ultimately starts to boil since it is impossible to loose the heat generated. As a result you can fit a larger bore shock to cope with higher driving speed driving for long distances over ground where the shock is very active (i.e. Off-road regularly and for long distances).
We also do not fit polybushes as we feel from our development work that they will not give a noticeable improvement in suspension performance, we will supply springs without bushes for you to fit your own polybushes. We do feel that whilst polybushes last longer than rubber to metal bonded bushes there is no such thing as a "free lunch", hence the forces that normally wear out the rubber to metal bonded bush must go somewhere and normally with poly bushes they go into the chassis and the chassis will show wear (i.e. Oval holes) at the linkage.
We hope you will buy GB Springs Parabolic's for your vehicle and look forward to hearing from you!!! Please contact us if we can be of assistance.