650 or 750 cfm. carb??

ok, so who out there has used a 650 edelbrock on a stock or modified 360?? i know that there must be some out there. what did you think of it? ever race it? if so how does the carb. work. I just wanna get it right the first time and now i see people saying in other forums that a 650 will not do if the car is going to be raced?? I won't be at the track every weekend but when i am there i want it to work properly and not being starved for gas. Thanks again guys your input is appretiated!!