Talk to Tim Ayres at New Elms morgan, he stocks the "rutherford" springs and will no doubt be able to advise you. You might want to look at adjustable AVO shocks whilst you are at it.. Alternatively speak to mike Duncan, by the look of your profile you are not that far from him
There was a thread on here a while ago, about king pin removal, DaveW took a great set of pics which might be helpful if you are doing the springs yourself, Also you may want to consider doing the king pins whilst you have the front in bits - I recently had springs and shocks replaced as the king pins were being done, saved a job down the road - just need to look at the rear end now!
Welcome to the Forum btw
