Great information. It might be neat to include the actual movements and air paths the cables and vacuum move around to allow fresh air when open and prevent weather and rain when closed. Just an idea.
On big hooded 71, 72 Road Runners and Chargers, fresh air systems were more cartoonist gimmicky deal. I bought my 71 hemi Road Runner after seeing an Air Grabber in the dark, in the rain, for the first time. Hemi and 4 speed were bonus. Theory was 3 inches high (from elevated hood bulge) and ten inches wide opening was Engineer's target 30 cubic inches of ram Air. Was great fun at lights, and looks much cooler from driver's seat...and IF complete sealed system...air might be cooler than under hood, radiator (26") passed through /heated air. I used mine through desert to and from Vegas, often, and external air vs. HOT radiator passed air was not much different. Drag from AG opening was noticeable as AG bulge is VERY aero enhancing at higher speeds at windshield base / side mirrors point of greenhouse. . .with windows ALL down, not much buffetiing inside car. So I used open AG below say 1OO mostly. I'm looking (decades), for a repro LUMP of a 71 AG, to run body color on a 72 Sebring. Maybe taller, for added greenhouse aero benefit at lower speed.
I would add an N96 fresh air intake (i.e., with the flapper panel -> "Air Grabber") and a 6.4 Hemi (485 horsepower) crate engine and long tube headers. Also, update the suspension (front and rear).
I have a 72 charger and added a bulge hood. To me from underneath the hood there are built in air tunnels from in front of the air cleaner to the front of the hood that just need to be opened up in front of the radiator to blow outside air directly at air filter sorta like buicks. Was that something dodge was thinking of and never did? Just wondering...
Glad you know the difference between a ram charger hood an a air grabber hood but your 1969 340 Dart came with a A v s carter 4 barrel carb and you sad it came with a a f b carb
