Several people have asked if these will fit Terminator engines or other 4.6L engines. So I tried last night to put one of these covers on my Terminator engine and I could not get it on. The cam gear on the Terminators is larger than the cam gear on the GT500s and it comes into contact with a GT500 cam cover.
Below is a picture of the cam covers side-by-side. On the left is the Terminator cover; notice the hump on the left side of the cover and how much taller it is than the hump on the GT500 cover which is on the right.