They will bolt up but the ports do not match.
I know your post is a year old, but a few times I've seen people in this thread mention that the headers don't work with aluminum or aftermarket heads.
That sounds kinda odd to me considering gt40p and cobra heads are heavily used on foxbody mustangs.
Ford racing makes 1 single set of headers that pretty much work on any basic 302 head including TW's, afr's, etc. regardless of make other than TFS high ports on the mustang.
The only difference in a P head is the spark plug angle, but normally a header meant for a P head will work on any head and it's standard headers that will mount to P, but there are clearance issues with the spark plug boot. You can actually run them, but you may burn up wires much more often.
I plan on putting my extrude honed wedges on my supercharged saleen explorer with a custom cam and ported eaton. I have an original set of TM's on the truck made by bob years ago (which still look great)
I do have extensive experience with 302 based engines in foxbody's, also have owned half a dozen different heads, along with those heads I've had a bunch of headers.
Not accusing anyone of anything, trying to iron out the details before I pull it apart.
Of course I could be wrong (that's why i'm checking), but the ports not lining up just doesn't make sense to me considering the ports are the same so are the bolt holes.
The vehicle itself should have no effect on the ports matching up.