Intake manifold fitment

Intake should match heads. A short list of heads includes Magnum, LA, W2, and plethora of factory and aftermarket race stuff.

Most people with w2 stuff know they have it, it's pretty special stuff. Magnum vs LA is easy to tell - Magnum has vertical intake bolts.

The biggest factor tends to be in the rockers and whether they're offset or not. Most aren't. There are also multiple offsets.