Anyone run an Edelbrock Performer 750 carb?

i also have a friend using a 750 edelbrock on his 455 olds and it works realy well to, another friend uses a 600 edelbrock in his chebby 350 also works god, maybe my 650helly dubel pumper is one of those that just didnt come out right but i hate holley after one summer with a carb that just refused to get anything even remotly refered to as relaiability and good power....