Finally the 3 feet snowdrift outside the garage is gone and the Mog is out again

On my first short stint I noticed that I must have a pair of new shocks in the back... I have also thought about fitting an anti tramp bar and I guess there are a few things to consider... First: How much do I have to dismantle to fit the bar at the front end (where the spring is attached)? Second: If I would like to
change replace the whole spring (both) at the same time - how big a job is that? Is it possible to do it from below without lifting the body?