That is correct on the 96-97.5 GT40 heads (non p) the EGR ports are INSIDE the lower intake, upper intake and the throttle body elbow. 
Your EGR valve bolts to the back of the throttle body elbow which is where the EGR ports inside the engine lead to. So there is NO EGR tube on the passenger side exhaust manifold 96-97.5 non P heads.

On the 97.5-01 model with gt40-P heads (3 bar heads) the internal plumbing no longer exists and the EGR sampling is done with the external metal tube on top of the passenger side exhaust manifold

So when I see a 97 model year Explorer with a 5.0 I can identify if it is an early GT40 engine or a later GT40P engine by looking for that tube
Let me get some pics posted to help explain (there are at least 3 variations of the GT40 upper and lower intakes on top of the 96-01 5.0 and you cannot mix match unless you really know your stuff with the EGR plumbing):


You can see why Ford would do this upgrade in 97.5, who wants hot exhaust gasses traveling through the intake elbow?? We don't. 
Plus when they get plugged with carbon deposits there it no easy way to clean it all up....

Last edited on Thu Jan 30th, 2020 11:59 am by 410customs