Little update for The Good, The Bad and the Ugly (1966):
There is a (silent) remastering of the new (4K) restoration which actually features original mono in English. I have specified details in my mono audio thread:
http://originaltrilogy.com/topic/The-Good-The-Bad-And-The-Ugly-1966-remastered-mono-track-for-4K-restoration-Mondo-IT/id/16791/page/6