What would You Choose and More Importantly WHY?

My 69 Coronet has a 440 and 727; the Dart has a 360 with a T5 and 4.10's. Even though the Coronet puts out well over 100 hp more than the Dart with a ton of torque, I still enjoy driving the Dart more because of the manual. Life's too short to just select D.
As for engines, in my situation it would be the /6 just to round out the engine types in my garage; but if I didn't have the Dart I would go with the V8.