Bruce,
The stock intake points toward the front of the car. Vintage puts a hole in the back engine compartment wall and that lets the intake hose attach directly to the throttle body. It then runs through it in a gentle arc before re-entering the engine compartment through another hole.
JPS uses a 180 degree fitting bolted onto the throttle body to point the inlet toward the rear of the car. The JPS solution is less efficient from an air-flow point of view (some of the 180* fitting available have sharp angles at the welds) and it looks a little cobbled up, but it cuts way down on assembly labor.
Michael