Agreed, as I re-read your post, I see where I mis-interpreted what you said. I read as long as it was an SB-2 frame, it would be OK, and what I now see you wrote was given the serial number, as long as it was an SB-2, and not an SB-1 frame, he would not have any problems.
Sorry, guess it was just close to home, as I have a 1998 frame, and they won't even put some (*) barrels on them (like the 45LC).
--Carl