I have started getting the 3 94's built for the 57 Bird 312. Making a list of stuff needed from Charlie Price at Vintage Speed. I am using a Edlebrock 573 intake with two ECG 1 1/16" carbs for secondaries that have Vintage Speed aluminum secondary bases; no idle circuits, choke plates, spark valves and new throttle plates that close fully at idle. The primary is a 1 1/16" venturi 2100. What is the best way to determine what power valve or valves to use? Do all three carbs need a power valve?

57 Black Tbird 312/auto