Just took some measurements on my 67 with RO scoop on flat fiberglass lift off hood..
Indy cross ram with dual inline Eddy carbs- choke housings stock and in place.
12 1/4 inches to top of choke housing from RB pad at front of the engine.
With hood on I have approx. 1 inch above the top of choke housing to bottom inside of scoop- this is for the front carb. Rear carb fits too but very hard to get inside the hood to see the measurement.
Front opening of scoop is 2 3/4 inches at front lip that rolls under. It's actually a little taller just inside front edge then tapers down as you move towards the cowl area.
How tall is your scoop?