Edelbrock Air Gap Cheap Knockoff
The guy I sold the 71 Duster too( with that motor in it) still has it and cruises around with it.
He stopped in with it last summer to let me see a couple changes he had made to the car( Full exhaust out to the back,Cragers)
here is the car when I had it, didn’t like the painted steel bumpers, but I never did anything about them….