For years in the 60's the centerfold was a given for car photos as many guys pulled them out and hung them on their walls. Even Playboy Magazine had centerfold photos also.
The engine shown in the photo is the 164 cu.in. 140 h.p. Corsa engine with the four carbs. I rebuilt and modified all four carbs when I had my 'Vair. After synchronizing them it made a difference.