Hmm! because in every aspect, excluding glass. It
is a 66 AC (not/shelby) S/C sideoiler!

I've been in
extended romping! mode in 4 (260cid, 289cid, 427s/o & 428c/o cid) different original Shelby AC's during my youth! This is just as strong as all of them. Except CSX 3116 s/o. That was truly a Beast among Beast!