Somebody mentioned something about Poly headers the other day. SBF? One of the evenly spaced exhaust variety heads. Just needed some massaging on the bolt holes of the headers.
that'd be me. You can modifiy the bolt holes and use small block ford headers, Mustang 5.0 GT headers work best for that.
Also, an LS1-LS7 intake will work on a poly as well. But you have to have a spacer made for the intake ports. otherwise, the spacing and bolt pattern lines up.