Fascinating.... then I could slap some RATOs on the belly and have DF/W to Mexico City routes. Not that
special, really! It actually seems pretty plausible? Good idea, bud. I like it. Guess I'm going to have to see what sort of mileage and stuff we're working with here. Further, perhaps the extra engines could somehow open up a route across the Gulf of Mexico over to the Yucatan Peninsula and their tourist trap From places like...uhhh.... Houston, Miami, or something.

EDIT: I looked it up... the range of the Caravelle listed at wiki (I don't know whether they which variant they use, however, but it's good enough) is BARELY enough as-is to get from DF/W to Mexico City. Well, now, with my super stretch with more fuel capacity it will now suddenly be able to go just enough further that it can top off fuel and make it all the way there and maintain fuel reserve. Bam... so, now, it's in Mexico City and needs to get back to D/FW and is super heavy with fuel to make the trip..... enter: RATO.

They did it with 727s and it was glorious.

(and DC-9's but I don't know if they ever fired them out of Mexico City)