My only concern with a big bad hood scoop is the early abody has such a small radiator opening. So if you open the hood up I believe you will scavenge air from the radiator and create a pocket of dead air around the radiator. I could be wrong . How about a large hole cut behind the grill in the radiator support and allow fresh air to blow into the compartment while driving? Also you can put computer type small electric fans (12-24vdc I believe) in the holes if idling for a while. Just to move some air.
Only other option is cut open inner fenders for more air OR smaller engine and manifolds....okay- that’s just silly. Sorry lol!