That sounds like a pretty nice deal, to me. Particularly if it has the hard-chromed hammer and trigger, with the smoother action. If they are color case-hardened, that would indicate the newer, MIM parts, though it's still a good price.
It is a K-frame, like your M66, with a 3" barrel and fixed sights. I think that the Performance Center is supposed to have massaged the action on these for a lighter, smoother pull, considering their intended users.
Heck, if your ego can stand the engraving on the barrel, a nicer trigger is nice to have.
Just curious, do you know why your 66 is having timing issues?