Running the airgap..I believe the stock unsilenced air cleaner will hit underneath the hood if you still have the padding attached. Mine did.
The RPM non airgap..air cleaner will fit with about 1/8 in to spare. Just block off the heat exchange cross over if you choose to use this intake..unless you drive it in the winter.
It also depends if you are running a spacer, an adaptor, and carburator. Also..make sure that air cleaner screw is cut down low as it can go.