1969 Camaro Z28 shifter knob or ball options

[Stingr69]

I know they never came with a jam nut BUT...
Chevrolet discontinued the Chrome Ball very early as I tried to get one in the early '80's and they were already discontinued by then.  The last iteration they sold was a crappy black plastic version smaller than the original and they looked like they belonged on a kids toy.  The repro looks pretty  good but the threads are no way as good as GM.  You need the lock nut just to keep it screwed on.

[169INDY]

Just throwing this out there, what about a drop of Locktite, ?

[maroman]

 Or a piece of masking tape wrapped around the thread.

[MO]

Or silicone, etc.