340 tunnel ram

I always find it interesting how everyone assumes two carbs of say 450cfm on a tunnel ram , is the same as running a 900 cfm carb on a single 4bbl on a sb. It's Waaaay to much carb for that motor.

I believe two 450cfm carbs on tunnel ram would be equal to about 780cfm of acctual flow due to less of a vacuum signal under the carbs.

Some may argue this point and I'm terrible at explaining it but maybe someone else can ...