Yes, you can do a full boil if;
You have a heat source that will keep the volume at a rolling boil.
You have the ability to chill the wort to pitching temperature.
You can handle the full volume/weight of the wort safely.
there are many benefits to a full volume boil. It is a big step in improving your beer. As soon as you can I suggest stepping up. YOu will need to adjust your hops down as with the decrease in density you are going get better hops utilization.