Will an Edelbrock rpm Air Gap fit under the hood
of a 66' with a small block 350 ?If so what kind of air cleaner should be used ?

Well I know a 71' is alot different but I do use that manifold, the edelbrock 7501 air gap manifold. Right now I have a low profile edelbrock cleaner on but a full size would fit and I have a stock hood, w/ 350 Ive seen them on 67's and they fit just right.

I had one on my 67 with no problems.

Atlfan, This should fit if you use a 3" high filter with a drop base (1 inch will do). The big block is suppose to by slightly taller than the small block and mine in my 66 hits the hood just enough to rub the air cleaner lid.

Tom