Well if you are running FI I would agree. Carbs are harder to clog up and easily clean if happens. Your exhaust will be fine unless you are running cats, those can plug up.
Lead deposits can foul spark plugs but it also lubricates the rings and cools the valves.
They make and sell the higher octane no lead gasoline for newer cars really..unless leaded gasoline is total banned in your area..might be.