Thanks Ben!
The air cleaner is a knock off of the old 70s Chevelle cowl induction setups, the spacer raises the housing up so that it just touches the bottom surface of the cowl induction hood.
Here are all 3
My friend John must have 30 hours of machining in building that spacer, but it turned out pretty sweet. Never thought it would be the horsepower adder that it is though.