Just for conversation.....
A 460 cubic inch motor SHOULD have a 750-900 cfm carb on it. See here:
Carb CFM Calculator
I have 2 Cobras in my garage, one with a 427 (454) with a 850 cfm carb on it that made 486 hp and another with a 545 cubic inch motor with a 950 cfm carb on it that made 750 hp. Both motors were dynoed on a stand and once installed. The numbers are real and spec sheets were provided by the builder(s) (at half the cost of the aforementioned build).
That being said, stack injection LOOKS cool but filtration is an issue if the car is going to be used for anything more than occasionally going to a show.
Just for the record, 750 hp is NOT fun to drive around town.
Please do not take offense at the other posters as they are trying to help you.