Re: Replacing-Clutch Master Cylinder
I'm not sure, but when I replace a clucth assembly, normally I replace those components and the throw out bearing. I believe 1987 uses an internal slave/throwout bearing assembly. While you have it apart, you may want to consider converting it to an external slave, that's what I did with mine.
To replace the clutch master cylinder is unneccessary. If it is working properly, leave it alone. I would however replace the internal slave assembly if that is what you have, wether it is working fine or not, replace it.