When I did struts in my 740, I did a couple of things slightly differently.
I had a vise with pipe jaws, in which I clamped the strut tube (careful not to overtighten and crush it) and used a pipe wrench on the gland nut.
I reused the old gland nuts, which appeared to be in good condition, (they unscrewed with no difficulty) and much sturdier than the new ones that came with the KYB cartridges. They tightened down OK and I have had no problems with them working loose.
The torque spec (in Haynes) for the strut top nut is 111 ft.-lbs. I didn't get one of them tight enough on the first attempt---it soon loosened and started clunking. I then used a large Crescent wrench on the 10mm flats and a box end on the nut itself, and tightened it as tight as I could get it. It has given no further trouble.
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