I was 6'3" and 167 at one point. My bench was 145, now it's 225 (got a ways to go). I've found that full ROM is better for chest deveopment. I squeeze my shoulder blades all the way together before I start and it helps.
I've been alternating full ROM and partial ROM every 2 weeks lately and it's helped my strength.
Eat some food and you won't be a skinny guy anymore. Oh, and if you are skinny the best thing I found to help me gain weight (besides eating more) was to cut down on my other activity's. I used to surf, skateboard and ride my bike for hours. Minmizing that allowed me to gain weight.
And definitely do some r. cuff at the end of your bench workout.