you would really have to cut one up to do thermoquads. not opposed to it but work. i do believe from a performance stand point the 1407 is probably ideal and would max out the as cast manifold. i would like to try a pair of 1407's one of these days.

He must not know anything about the early AFB air flow ratings, those stock small bolt pattern AFB barely flowed 400 CFM originally each.
I wish he had stated the actual carb #s instead of ASSUMING that they were 625 CFM Carter AFB
I've owned and race several cars with stock dual quad sets up like that one years ago
We never made the fuel systems good enough to feed the motors more fuel than they needed, they always show the plugs being dead lean at WOT WE didn't know what we hadn't learn yet

those stock carbs were nowhere near 625cfm each.

if i had to give an educated guess, i would say they "might" be around 395cfm each.

To me it looks like someone from marketing made a conceptual sketch of an interchangeable top manifold using a magic marker on a Mcdonalds napkin while they were eating lunch. Then somebody picked up the napkin and sent it off to the pattern shop. Nobody including Indy wants to tell you how it compares to any other intakes including their own. Can it putt around town or is it an 8500rpm race only piece? It would be killer if it actually fits somewhere between the Edelbrock dual planes and the Indy tub style intakes. I know there are a few running in NSS but I haven't seen any comparison with any of the other manifolds that are available. Have there been any comparative tests posted or published? If anybody has experience with these please post results and thoughts.