Torqueflite 727 question

Which one keeps the tranny cooler, a deeper pan that will hold two extra quarts. Or oil cooler lines running to radiator cooler? Looking at doing one of those two mods but don’t really don’t want to do both if both aren’t necessay. I don’t have lines radiator or deep pan yet. Just trying to see if I can do one without the other. Two barrel 318/727 basic driver car.

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