The consensus was and is the Edelbrock Performer 750 had a fault- a fault the Performer 500 and 600 do not have. What lends credibilty to this claim is the fact Edelbrock omitted the 750 cfm size for their Thunder series and chose to develop an 800cfm unit. The Thunder line is offered in 500 600 and 800cfm.

Keep old mopars alive.