The trouble is that most of the sources with the uncut and alternate footage are usually in PAL and only in Italian or Spanish.
Are any of LeoneNut's edits available anymore? I'd love to see his Duck, You Sucker for the correct audio.
Great link for FAFDM. After digging around in the Leone forums, I found a thread that talks about the old US LD having the scenes intact but missing the scene with the official and Mortimer "naming" Manco.
http://www.fistful-of-leone.com/forums/index.php?topic=7269.30
It's really revealing to look at those old MGM DVDs nowadays, to see what we've lived with for so long. Fistful has a giant bright white line running along the side of the frame for the entire film, FAFDM has the cuts and a audio sync issue and both are non-anamorphic letterbox. The newer DVDs are better but I still have my old ones. The Blus all have issues and you're best off it seems to go for all foreign editions. At least GBU still has a fantastic first DVD.
For the first two I'd recommend the 2 disc DVDs, as they have great commentaries, anamorphic video, mono audio and are quite cheap.
No version has yet to compare to the theatrical experience though. I saw the Dollars films and Duck, You Sucker! a few years ago and all were stunning to behold...except that GBU was the bastard extended cut, DYS had the improper 5.1 remix, and FAFDM was in really bad shape. In fact it was so much that the theater had a sign posted for refunds if you couldn't live with the print.
There was a scene entirely pink, the mono was too low for the first reels and way too loud on the last ones, but it looked phenomenal despite the print's condition. The Monco scenes were there proving that this was a pre-United Artists re-cut. But the laugh was cut and the fight may have been a little longer. I'm thinking that although these were dubbed in English that they were dropped somewhere around the time of the dub being finished for whatever reason.
No one is ever able to replicate that Techniscope look on home video. For the Leone films it's usually the color which isn't as deep. This may be due to the MGM produced new prints. With an outside company they struck new standard 35mm prints from Techniscope originals.