I just figure that Clark Custom has to have a pretty good handle on this stuff and avoided the cheap imported 1911s when I made my 1911 purchase.
It's the opposite - Clark knows what works and sticks with it. They have no interest getting a handle on the entire 1911 market and assuming the risks to save a guy a few hundred bucks on a donor. Also, Clark has a definite preference for hammer forged frames and slides.