1972 W116 280SE - engine swap to 300SEL 6.3? worth it?

Considering a engine swap on my 1972 W116 280SE to the 300SEL 6.3 powerplant, weighing pros and cons. Would be a significant boost in performance but at what cost? Increased complexity, potentially altered handling dynamics, and potential impact on car's overall value. Any owners or experts with similar experience willing to share insights?