Based on my height and weight, I'm and average build. A little on the slim side yes but not underweight. My frame may not keep every bit of my gains but that wasn't the goal, my apologies for not making that clear. My normal mass will return with time, just as it always does after being sick or lack of training...HOWEVER I want to boost it further and make the attempt to keep the added mass.
As far as diet and training go I've recently adjusted both to compensate for the time lost due to illness and injury. I normally lift 4-5 days a week and run 5 miles day. If I lacked cardio I'd be heavier (body fat be damned) and would probably suit what you would suggest is a good base.
I apologize for neglecting certain details in my initial post, I been more specific goals when I ask for opinions.