Re: Setting Up a Rear Blade on 3pt
If you stand behind your tractor, you should have an adjustable link for the right side lower link (hitch point for the implement). The adjustable link will be like a large turnbuckle.
That levels the implement (rear blade) side to side. You can use a level if you like, but I just use a calibrated eyeball.
You mentioned the threads on the adjustable link don't lock in....isn't there a jam nut on that link? There should be...
As far as side to side sway, lower the blade and tighten up your anti-sway links. You'll still get some side to side movement (say...½" or so), but that's about it.