Yep Flathead, its true.
Any M77 MK-II with a 792- prefix or newer is a sure bet to have an LC6 trigger just like the Hawkeye.
In fact, I recently picked up a new MK-II in 6.5 X 55 Swedish Mauser and it has the LC6 trigger. Its serial # is 791-88XXX.
Also agree, hats off to Ruger for fixing the problem rather than just ignoring it, especially on the standard model like mine which Ruger knew they would be discontinuing anyway. They could have easily just let those last few standard models slip right through with the old triggers, but instead they installed the LC6. I think it says alot about the company. That's one of the reasons why they are the best.
Skunk