Re: the italian "conversions".
In my limited experience with these I've accumulated a 2 made by/from Uberti; one built as new for Cimarron Arms (thru Mike Harvey's Texas Jack retail outlet), and one by a private individual, made before any factory models were available. Both work ok; the Uberti factory job is nicely made and operates well with 45 Colt cowboy loads. The private job works well also, I've restricted it to 38 "Long Colt" black powder loads.
Currently have 2 conversions by Gren, who's no longer in business, probably the best workmanship in what revolvers I have so far. Good workmanship, smooth triggers, no issues. Not sure how many were made, but probably low numbers.
I contacted another fellow who is doing custom conversions and modifications, he looked at what I believe is an ASM i was proposing to convert and said it was not suitable due to certain size characteristics, and possible material issues. He recommended Pietta manufacture or Uberti, and seemed to like the Piettas as a basis for extensive conversion. He has a website with some interesting information; I can send it to interested parties.
Summary: It appears Uberti & Piettas are both a sound basis for conversions, either factory or by gunsmiths with experience in this type of work.
Others brands may require additional attention, and therefor additional expense to convert.
This is my experience only, and is certainly not an "expert" opinion.
edit to add: I returned to home base today and looked closely at a Traditions 1860 Army I had, the only revolver i know is a Traditions brand for sure. It was made by Armi San Marco.
Sorry you didn't get the one you were looking at.