Performer RPM Air-Gap + Holley 750 + 4" air cleaner = Stock hood clearance?
This is a pic of my 69 Dart 360 with Air-Gap intake and Edelbrock Carb. I used a shorter filter than before and went with a lid filter as well to make up for it.
I had to raise my engine up almost 1/2" to make the TTI headers clear everything which constrained things a bit more then they might in your case.
It all fit with about 1/4" to spare... solid motor mounts are a good thing in this case.