I use the 950 HP 4150 on my car and love it. Thought you might like to see a carb comparrison done on a small block of unknown size. The 950 beats all the other smaller carbs with the exception of one rpm point for one particular carb. The cfm for cubic inch charts are somewhat out to lunch. If you are building a grocery getter, use them. If you are building a truly high performance engine to be used in a car with good off the line gearing, a much higher cfm can still be used with great results.
p.s. If you click on the image it should make it larger