quite an old car this so nipples may be a bit tight,get a good fitting socket onto them,give a good spray with wd40 before you start,one whl.cyl is getting fitted,why not replace both and that is both rear sorted,apply copaslip to each nipple when you fit them and you wont have the same problem for a while,must be careful with the front calipers,gently work back and forward, if you think they are going to break stop and try and source a welding plant and apply a small amount of heat round base of nipple and try again,once free clamp the hose, remove nipple and make sure it is not clogged up,apply copaslip and refit,good luck.
wickham
July 2010