After reading until I was numb, I settled in on the aero scoop. It seems the keys factors as has already been spoken is getting it in clean air and getting it sealed. I'll post a couple of pictures that shows a little of what I did.

7567310-March62012019.JPG (137 downloads)
'75 Plymouth Duster
Phase I 451 906/590/2-660 10.75/126
Phase II 451 Stage VI/590/1050 9.82/135
Phase III 383 906/Victor-Pump gas 11.30/119

"For by grace you have been saved through faith. And this is not your own doing; it is the gift of God,"