Hey new Guy,
Sweet looking truck!
If the vehicle is new to you, it is recommended to go through the entire brake system rebuilding the master cylinder, wheel cylinders, replacing all of the metal lines (yes all, not just the easy ones), and all of the rubber hoses. The single reservoir is fine provided it is a solid tight system. The cost and effort is not that great, and then you will know exactly what you have instead of wondering/guessing/praying. A sedentary lifestyle is terrible on hydraulic brakes, but all too common on old "occasional" use vehicles.
If it were mine, I would keep it stock and simple.
Good luck and welcome.
Paul
