I believe you'll enjoy the forum.
That is a nice model 66. An early K frame is really hard to beat.
I have a 66 ND w/ 6 in. BBL also, it's a dang tack driver, even if I'm not.
Again, welcome.
Mine has some really nice target grips on it, I don't think they're original.
I sure like the looks of the ones you have.