For carburetors, you will find some people who love any given carb and aome who hate it.
For the Rochester "B", the most common complaint is that at least some of them are vulnerable to the castings warping leading to leakage. I believe there may be some with a more sloped top to the upper casting that are more stable but am not sure of this. The "B" are also not designed for high angle off road work (more likely for economical production), there must be an open topped well within the casting because fuel can spill at high angles.
You will find a variety of opinions expressed at stovebolt.com:
http://www.stovebolt.com/ubbthreads/...s.php/ubb/cfrm
I find the posts on carburetion by "Carbking" to be particularly valuable. He is opinionated (who in the hobby isn't?) but I believe his opinions are based on wider experience of carburetors than most as he does carburetor rebuild/restoration
http://www.thecarburetorshop.com/ and has a page on the W-1
http://www.thecarburetorshop.com/CarterChevroletW1.htm