I have been building a few of the 331/347 latley and I just got done looking at a certain Mustang forum and every one and their brother has a 331/347 that runs low 11's with 3.55/3.73 gears naturally aspirated make 500+ hp on pump gas.
The all claim to have hyd. roller cams,CNC'd 225 cc AFR heads etc.
What I am trying to say is I'am glad most of the people on this forum have a grasp on reality.