A big thanks to Donovan at Ground Control for answering my newbie questions. I just got off the phone and, according to him, the threaded sleeve is just going to rest on the tapered part of the shock body, just above my blue line in the 2nd pic. The link bracket is just going to attach below that. If I put the link bracket just at or below the blue line then the bracket won't come in contact with the threaded sleeve. He said the sleeve doesn't necessarily rest on or come in contact with the link bracket. He told me the marking of the original bracket was less about the height and more about the circumferential orientation. Good thing I marked both just to be safe.
Hopefully I won't run into any other questions and I can wrap up this evening.
I play real sports. Not tryin' to be the best at exercising. - Kenny Powers