location of twin hood scoops on 1970 Duster
These two links helped me locate where to install the hood scoops at least close. Like I said I put the 4 1/8" holes near the back of the scoops which is below the hood support instead of up near the front of the scoops where you can see the seals from the front.
http://www.forabodiesonly.com/mopar/showthread.php?t=85416