Sounds similar to a project that I am working on.
I am using older Lemond size 53cm framesets and DA8 groupos.
I have the steel side covered with 1999 Zurich Reynolds 853, horizontal dropouts, 1" threaded headset and a 2001 Maillot Jaune with the ovalized Reynolds 853, vertical dropouts 1 1/8" unthreaded headset.
For Ti I need to get an Arrivee framset.
For Al I need to get a later Chambery with its Time Stilleto fork or an Alp de Huez with the Air Rail fork.