Hood clearance with RPM air gap and 73-76 duster hood?

It will work.
I have a Holley Strip Dominator, std. drop base with a 3.5" filter, solid top and a 1" spacer on my Dart Sport. It rubs the top a little on one spot and I had to carefully measure & trim the carb stud. If the wing-nut/carb stud rubs a bit or dings the hood, the scoop will cover it.