Original sentence: The Ryan NYP had a fuel capacity of 450 US gallons (2,385 lbs) which was necessary in order to have the range to make the anticipated flight non-stop.The original wingspan of the Ryan M2 was increased by 10 ft and redesigned to create a surface area large enough to lift 450 gallons (1,703 liters) of fuel (carried in five fuel tanks: left wing, right wing, mid wing, nose and in available payload space) along with the lone pilot and minimum necessary gear
Edited sentence: The Ryan NYP had a fuel capacity of  or  which was necessary in order to have the range to make the anticipated flight non-stop.The original wingspan of the Ryan M2 was increased by 10 ft and redesigned to create a surface area large enough to lift 450 US gallon of fuel (carried in five fuel tanks: left wing, right wing, mid wing, nose and in available payload space) along with the lone pilot and minimum necessary gear