Remember, the "average" typical trooper from the originals were 5'10'' - 170 lbs.
you being 6ft - 230 lbs is obviously going to make the standard armors a bit constraint without extra work.
I mean if you want to start from scratch you can always look into AM Armors, They are made for bigger troopers. The armor pieces are much more spacious.
Or you can just buy certain parts from them (i.e. kidney, back, chest, shoulder) those are the parts that seem like they need to be bigger on you.
Or you can make the shims for the ab/kidney connection and make the strips bigger to make the parts more open/spacious.
As i mentioned, its all completely up to you in the route you wish to take.