I have put new gas shocks on the back of my lwb 4 seat but with 1 person in the back I am still hitting the wheel arch, have shaped the arch as much as can go, can I do anything else with the suspension.

Raise the rear end by turning the torsion bars ( how to available on Youtube  other video channels are available)

will have a look

Pretty sure there are instructions on Peter's site manxmaniac
Been covered on here several times as well so worth a search

Just mind your fingers, there is a lot of tension in there

I made a tool to help with this (you can buy one but they are £50)
http://www.beachbuggy.info/index.php/topic,9103.msg110044.html#msg110044

I've just done this to mine, not as scary as it sounds, you can make very small adjustments (less than 1deg) by turning the inner and outer splines. I used a digital angle gauge and took the spring plate from about 10 to 16 deg. Best explanation I found on youtube was by Milo Manx 'how to adjust spring axle spring plates'

Cheers
Chris

Adjusting swing plates on their torsion bars can sound daunting if you read write ups on the net especially with the degrees and minutes charts. Long ago I was totally baffled. The term indexing meant nothing to me and my school days maths achievements were dire.

Don`t make it difficult to ponder on...  Give it a go and all becomes clear... You can get an angle gauge, (inclinometer), that is totally suitable for £5, (honest). It will be plastic but good enough for this job. A few more quid will get you one with a magnetic base. Really helpful but if you are only going to do this sort of thing infrequently buy something cheap. Comes in handy for all sorts of things.

number of inner splines different from outer to allow indexing. Rotate inner one way get a "big" change in degrees, figuratively speaking, move plate on outer splines the other way to get the adjustment more "fine" and so on.  The hardish bit for a first timer is "feeling" the torsion bar inner splines entering the splined bit down the tube. By this I mean it`s easy to get the torsion bar splines home but you will have to pull out and get it another spline round for more adjustment. How to know you are just one more spline round. Not as difficult as it sounds if you practice it because you will develop a feel for moving a spline at a time. Trust me on this.. you will. The inclinometer gives you a visual check on the angle the swing plate sits at when its up on its "peg". There are differing views as to what angle to aim for initially. It`s a try and see thing as you work your way to the angle that suits your buggy rear wheels for camber and the like. Patience is the name of the game as you will have to repeat the process until the wheels sit where you want them.

Get the set up into bits. Have hold of a torsion bar and have the swing plate next to you. Sit beside the torsion tube and have a play about and you will see what it`s about.

Have to preach here... Careful... a fully wound up spring plate as found in place on a beetle needs to be treat with the most respect ever. Whatever method you use to lift the plate to get it off the peg and then "un-wound" keep your head arms and body well out of the way when trying to prise the plates outover. An almight bang and the bits can fly away at rocket speed. At the very least is the huge bang as the plate comes off the stop.  Ok dad`s spoke out just take care

A simple task the biggest problem can be seized nuts and bolts through the shock absorber, just keep body parts clear when you lever the spring plates off the castings and work from the top down so it goes away from you.
Chimps doner chassis was under that much tension that 2 people stood on the gearbox and it still did not move down at all and I have no idea how they got that much tension on the spring plates but the came off with one hell of a bang when released..

Hi Snoopy ... Yes  I have had the seized bolt issue. Often I have had the shock absorber bush stuck solid to the smooth part of the bolt shaft. Learned the hard way not to grab the bush in grips, stilsons etc. just made everything ten times worse....  Why do we call this fun