Strut rod question 67 cuda

I noticed while snooping around on car that there were more threads showing on passenger side strut compared to drivers side.
Also the "looser" drivers side, the bushing was nowhere near as compressed as passenger side. Cotter pins on both sides intact.
I go to tighten drivers side as per fsm(40 lb/ft). It is nowhere near that. I have it now around 30, but there's no way those cotter pins were designed to hold the torque on the nut. They're there imo to keep nut from backing way off.
Before I dig too much deeper, should I use med strength loctite on nut?
Thanks all!

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