RE: " 1911" rebuild?
Nonmercy, If your just want to to tweak it some or accurize it, it should be a fairly simple job for a competent pistol/gunsmith. The slides I don' t think are interchangeable, but I am not 100% sure. But that is no problem as the slide and frame rails can be tighten using the same tools and method that you would on any 1911A1. The barrels are interchangeable if I am not mistaken and the magazines as well.
I beleive that other parts, like the trigger, safety, beavertail safety, mainspring housing, can be replaced with 1911A1 parts, but require minor to major refitting. I am not sure about the slide parts like firing pin and exector are interchangable or needs major refitting.