Yeah there is lots of experimentation that can be done. Others have said, get ready for a jet change, with a plate seal, but i don't even know which direction to start going? Richer, or leaner? All i know, is that the quickie half-fast plate on my 850, and the elaborate one for the maxwedge intake , with two nice bellmouth intakes, notched and sealed around the wiper motor, etc, both slowed down the car without carb adjustments made for the seal.
I am going to try the plate for the 850 again. I have a beautiful max-drop air cleaner made from spun aluminum. Unfortunately, i never found a carb that i could use it on. Too much drop, never cleared a fuel inlet, or throttle linkage, on anything! However the lid is shaped like the inverse of a velocity stack, and maybe just the lid, on top of an air cleaner element might straighten out the airflow. I'll give that a try next time out too.
I have also heard, and seen , relief holes for air evacuation in plate seals and the back of hoodscoops, so that too much air doesnt get trapped in the scoop and stagnate. I have no idea if it works.
