Not that my opinion is worth anything . . . cause it isn't.
My vote though, is to take the loading lever off. Obviously, it looks good with and wothout . . . but . . . . think about if this had been a conversion done to the pistol, say, in 1880. The loading lever is no longer functional so it really doesn't serve a purpose. If I was a cowpoke that was going to carry this, I think I'd like the fact that it was more streamlined without the lever and in my mind (whether it was true or not), I'd probably be thinking that with a new holster contoured for the new shape without the loading lever, it would "clear" leather faster when I needed it. After all, now that it's converted to those new fangled self contained cartridges, it will never be re-converted back to cap and ball. Just my 2 cents worth which ain't worth the copper it took to strike 'em! Either way . . . . you've got one fine looking revolver! I hope it brings you many hours of enjoyment!