[Hammer]

81 GT... You're right, the 5.0 has only gotten stronger.
I never said it wasn't a great powerplant.

I have driven 5.0 GTs since the late 80s, some brand new.(although they weren't my cars...)

"Struggling" at high revs may have been the wrong choice of words.
But the difference above 4k rpm as far as the engine "feels" is VERY different between a new 5.0 and 4.6 (in stock applications)

Just as the low end torque that the 5.0 has, is missing from the 4.6 in stock applications.

As many of you know, I'm a prominent member in my local car club, and I've driven many highly modified 5.0s.
(N/A-Blown-Juiced)
Some of them 11 second monsters, they were extremely impressive. Now THEY revved freely and depending on the setup, LOVED the high end. What I'm trying to say is that, in a stock form, the 4.6 is a more "rev happy" motor.... especially since you don't see much until about 4k rpms... ;(