I happen to be the proud owner of a 1950 vintage Ballester-Molina 45 and a 2022 vintage 1911 in 45. Recently I was browsing another gun site that will remain unnamed and found a thread about the Ballester-Molina that rather surprised me ("piece of crap, not remotely like a 1911, etc, etc). Some 'expert' explained that the Ballester-Molina looks like a 1911 but that the only part that interchanges is the magazine.
When I first acquired my Ballester-Molina the barrel was shot out, so It had to be refurbished, and the gunsmith simply replaced the barrel with a standard 45 acp barrel-- so I was pretty sure they exchange. But that was before I got a real 1911. So, today I did a little experiment. I dug into my parts box and found that original shot out B-M barrel, then I took the barrel bushing, recoil spring, spring guide and spring retainer out of both pistols. Then, I installed the original B-M barrel, B-M barrel bushing, and all the B-M spring parts into the 1911. Perfect fit, tight lockup and even the tiny gap between the frame feed ramp and the barrel looked good.
Now-- I'm not suggesting that I should take that gun out and shoot it that way without checking with a competent gunsmith-- but given that the parts fit so good without even adjusting anything it seems to me they are interchangeable.