Line 2 and 3. The big man is 'an 11,5 feet tall grown up man'. Feet used to be smaller in former times I guess.
Line 3. 'Seek' is literally a fur coat. But a coat makes no sense here, so I think the later meaning of seek is very old. 'Settling' is sitting on tradition: to reside. 'Following, possessing, catching' or: following means catching (to catch or to be caught?).
Line 4. No need to feel faulty or: what can be wrong, how can this be wrong? Harmen wrote an article about you fu, "have protection".
Line 6. Sacrifice at/to Western mountain. Heng is the same character as 'expansion', it is a sacrifice for success. Another explanation of this line: holding on to something strong or high, and giving thus others something to hold on to. Lynn translates: seize and bind him, then so tied up make him follow. Schilling: dann legt man ihr Gefolge in Fesseln. According to Rainer Simon Wen Wang could flee. After his imprisonment Wen Wang went to the Western Mountain to sacrifice.
The allegory seems to be chosen from the annals of the Chou dynasty. The rulers of this dynasty honored men who had served them well by awarding them a place in the royal family's temple of ancestors on the Western Mountain. In this way they were regarded as sharing in the destiny of the ruling family