INDY 'modman' 2x4 intake. How much would you spend if...

Sean, this is the coolest thing I've seen in a while for these hot rods. I love it!
I saved these photos to my computer and I will see how my hobby funds go in the future, I think this would be really cool on my 69 Dart but I know that buy the time I bought this intake, carbs, and the small parts it will get pricey real quick. Everything you touch is fast and well thought out.
I currently have a mild 500" RB, Indy dual plane intake and a basic 850 Holley. I figured the first thing I'd get rid of on this car was the intake and carb but it is so snappy and fun on the street, I haven't touched it. I have the big Hemi style hood scoop so plenty of room.
Camshaft is just a 540 lift Hyd roller, this engine dyno'd at 583 hp, 600 torque.
I think the 'Seanman' intake and a couple AVS-2 carbs would improve power.
Thank you!