What size are the two bolts that used for the transfer case mounts (the one's that go through the mounts, crossmember and into the T-case adapter). 7/16 seems a little loose untill about half way in. 1/2 is too big. 12mm is only going in about 3 or 4 threads and it's real tight. Should I just use 7/16 or is it something else that I don't know about.