click link, scoll down to read specs.
Edelbrock 850
https://www.edelbrock.com/vrs-4150-c...-cfm-1308.html
Edelbrock 750
https://www.edelbrock.com/vrs-4150-c...-cfm-1307.html
Edelbrock 650
https://www.edelbrock.com/vrs-4150-c...-cfm-1306.html
anyone with experience knows, take a Holley 850, put sleeves in to reduce the venturi to 1.39",
then add big annular discharge boosters, it's not an 850cfm anymore.
it's more like a 680-700cfm
an old 750cfm BG Race Demon with scalloped entry had a 1.4" venturi.
and BG specs were wet flowed which pumped the numbers up a bit.
a 1050cfm RS Demon would flow 950cfm with annular boosters, no other changes, on the BG wet flow bench.