I did the same thing, wasting my time with bodypart splits for quite a while. I never really got much stronger OR bigger. One great way to go for you might be an upper/lower split with 4 days a week in the gym. That would give you two days a week for lower body and two days for upper body.
I'm sure BTB will chime in, along with plenty of other guys who can help you get on the right track.
Current PRs at 242- 495, 345, 585, 1425