The Fish carb has a place in NASCAR history.
My mentor in the carburetor business did an extensive test on a Fish carburetor some 40 years ago. An ex-marine, his language was quite colorful at times, and got that way when discussing the Fish.
We sell FULLY RESTORED TO ORIGINAL CONDITION Fish carburetors. They are guaranteed to work as paperweights, display units on the wall, etc., but NEVER as a carburetor.
But many still want to believe that one would get 197 MPG on a 6 cylinder Chevy or 78 MPG on a 440 Chrysler motor home (both of which would violate the natural laws of physics).
The best advice I can offer is do your own test. Then you can write your own article (which will be disregarded by the true believers)!
Jon.