Details of the coil over suspension conversion for balljoint torsion bar front ends
Coil over damper:
See below for the approximate dimensions of the set-up. The kit is available from Legend Motor Company but it did take 3 months for mine to be delivered and even then was incomplete, it could easily be built yourself for well below Legend's price of £300 +VAT excluding the springs.
Note: the first lengths given are for the upper bar which is longer than the lower one, although the threaded parts should be cut down after fitting to avoid clearance problems with the tyres.