Thanks for the feedback, guys!
I think I'll go ahead and make the swap happen if I don't end up having enough of a pile of components from the parts bin to make it seem reasonable. Still need to get the Mercian frame powdercoated and decaled before I mess with it.
@
squirtdad I have several English-style bottom bracket setups laying around and imagine one will fit the Mercian even if the parts from the Club Fuji don't.
Cheers!
-Gregory