Custom Oak Cycles 650B French Randonneur Project.

Correct me if I'm wrong* but I thought threaded forks were cut to the headtube length plus enough for a locknut and any height adjustment was achieved by raising and lowering the quill stem?

*which I almost certainly am

Yes, but an uncut fork will extend further up, and could be because of a number of things like "faking" a slamdatstem for aesthetics but also a longer steerer with a slammed stem will be less flexy than a shorter one with loads of quill poking out. also you may need a few spacers to get ideal position for centre pull hanger