A word about bodies- my Jack is on the HT Perseus body. I got a Royce body but when I cut the neck off the Navy Seal head I'm using the Royce neck was too thick.
The Perseus body has the Royce/Wolverine arms but the chest/neck is hard plastic, unlike the rubber chest/neck on the Royce/Wolverine. I still had to trim the inside of the head a lot but it fits much better on the Perseus.
Of course, then I had to swap the legs off the Perseus (he has realistic legs with unique ankle joints that don't fit regular HT feet)....
So just be aware that the neck on those Wolverine/Royce bodies are wider than regular Truetypes. I guess it all depends on the diameter of the neck on Nek sculpt.
I'm also working on a way to swap Royce arms onto a regular TT so I can give John Locke some realistic arms. The short sleeve shirt covers the bulky biceps and the forearms look great.