I have one on my daily driver. They used the mid 80's Ford truck lower intake manifold. The Saleen and Vortec were the same thing just different names on them. Back in the day it was one of the best intakes on the market. It was called the shootout intake. It had x-tra injector bosses on the side of the upper plenum for increased fuel enrichment,such as running nitrous,supercharged,turbo's. You had to machine the bosses though. Anderson Ford Motorsports used to use these manifolds all the time. They used to sell them also. They use to retail for over $600.00.