By Colette Bennett It’s hard to think of Yum Brands’ Taco Bell as a 60-year old company, especially considering how youth-forward its marketing is today. It’s hard to think of Yum Brands’ (YUM) – Get Yum! Brands, Inc. Report Taco Bell as a 60-year old company, especially considering how youth-forward its marketing is today. But the Bell has seen some decades roll by, and its clearly gained wisdom from them. When Founder Glen Bell opened Bell’s Drive-In in 1954, originally serving hot dogs and hamburgers. he planted the seed of what would one day become America’s choice pick of late-night meals…