Any question answered...

What's the deal with running a threaded headset without the lock nut? Found some replacement forks for the nevatronsinglespeedshopperofdeath but they are about 7mm short on the steerer. Could I get away with running without top nut? Maybe loctite?

Using loctite, despite what anyone tells you, is a pretty good solution.
I broke the top nut on a 1 1/8 threaded headset years ago, and loctited the lower nut in place. Since then I have ridden about 1000 miles around remote african countryside, added an xtracycle to the rear and haul heavy stuff once or twice a week (like 125 kilos of stuff) over a dirt road for 4 miles. If anything would test it that would.
The headset has had no attention whatsoever in that time, it was well greased on assembly and still turns sweetly and has no play.