trailing arm bushings

[j.honor@comcast.net]

I'm going to replace my lever shocks with TRF repalcement shocks, considering 
also replacing trailing arms bushings at same time. is it necessary to 
completely remove the entire arm itself to do so? or if I remove the spring is 
that possible then? if not is this a particular onerous job for the whole 
thing? I've read manual etc hard to tell.