If your an NPI headed stang, and have been wondering when an altered PI intake or adapter plate was ever going to be available for us, you can stop wondering. Livernios has come out with a kit that includes all that is needed to swap the intake. There have been some testing by the t-bird guys who used epoxy to mate a PI intake to NPI heads with some good success in the power improvement department (no pun intended).
http://www.livernoismotorsports.com/product.phtml?p=457&large=1
http://www.livernoismotorsports.com/product.phtml?p=457&large=1