The front torsion bars need to be dismantled completely to add the most common adjusters....
The rear sounds easy... but it can be dangerous....
I wouldn't try the rear adjustment Myself...
but I have taken the front torsion bar assemblies apart & replaced them after the adjusters had been fitted to the torsion bar tubes by a Welder/fitter...
it IS a Big Job but it can be done if You are Mechanically minded and have a good toolbox of Metric tools... and a lot of spare time...
Talk to a few people who have done it, and make up Your mind whether You can do it...
Best of Luck
Lee
http://community.webshots.com/user/vw68autobug
- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---