" what are the part numbers i will need"
That would depend on what's causing the problem.
You must have missed this part of tip # 16:
You probably have a worn lift cylinder or piston (or both), a blown top cover gasket or a leaky pressure relief valve.
Of course, if you just want to replace everything w/o diagnosing the problem, then you will need a relief valve, piston, cylinder & gaskets.
And while you're in there, you might just as well adjust the internal linkage.
You'll need a jig for that.