My '97 T-Bird has a black plastic (composite) intake manifold with an aluminum crossover on the front of it. I'm pretty sure that the manifold may at one time have been replaced because I've noticed that someone used masking tape to label all the electrical and vacuum lines as to where they go. Were some of the original all plastic manifolds replaced by Ford under some kind of recall? When did Ford start using the plastic manifolds with the aluminum front crossover? How can I tell if my manifold is a Ford part or a Dorman manifold, which everyone on these forums seems to think is junk?