I've been looking at manuals and searching posts for days and found everything I was looking for. I finally bumped up the fuel, tested & tested some more, checked and rechecked the numbers and am real happy with the results. Nothing to aggressive and I can get up long grades without holding everybody up behind me and more importantly with less than 1100* temps. That smoke while leisure cruising though.....
There are some other things that may be contributing to your smoke...
If you have an LDS, it's just flat-out going to smoke more than an LDT. If yours isn't an LDS;
Have you washed out your air filter lately? Even though it may
look clean, you might be surprised at how much filth will rinse out, rinse, after rinse, after rinse...
Have you had your injectors serviced lately? If so, are they one-hole type? seems like one-holers dump more fuel into an LDT than it can use efficiently at low rpms.
Are your valves well adjusted?
As for the droop screw, when I got my truck my droop screw was missing. Had to put a replacement in. It does have a fair amount of resistance when adjusting, even without loctite or such. Don't know if the threads are intentionally machined a bit tight or what, but mine is stiff enough that it certainly won't vibrate loose.