mm i'm not sure if i understand your question. by "intellect of the glutton" do you mean the fact that the 7 is in the mental triad? if so, i was also surprised with i first read naranjo with its focus on "gluttony" because of the enneagram descriptions of the mental activity of the 7 i'd read previously, but then i saw myself completely in the description.
how are the two things connected? the way i see it (actually, the way i feel it in my personal experience), i have a constant mental activity going on. which has a nervous streak to it, because it includes all the things i'd like to do + all the things that are happening in the real world and that i'm connecting to other things (ne) and i also tend to plan on how to avoid future difficulties, obstacles, etc. but it's not a well thought out thing, it's just a stream of mental activity.
anyway, this constant stream does not really have a direction, and i sometimes crave a purpose, and i kind of feel compelled to satisfy that craving through "eating" many things. well, if i had a sense of purpose, maybe i could be content with knowing what the goal is and not want everything all the time. but since my mind is constantly searching for new information to add to the already existing information and to somehow find the "piece of the puzzle", i am happy to "eat" experiences, food, etc, anything, that will leave me satisfied for the present moment, or feel that I'm "at peace" in a way, and that will make me forget my mental anxiety in regards to the future.
i don't know if that rings any bells with you. i guess you are wondering if you are 8w7 or 7w8? but if you don't identify with naranjo's description you're probably an 8w7?