hi Dave, Backtracking here because something dont add up with the engine failure, the clue is the seize (partial?) on no' 3 rod bearing and the seized no 1 main, that is down to low oil pressure, usually due to oil surge, i know you are dry sump, but it can still happen in the d/s tank, i think the other event with the flywheel coming loose?? may be a red herring, its definitely lost oil pressure and that is separate to the loose flywheel im sure. its important to isolate this earliest as it may carryover to the new engine.
regards anyway.