If you're not hungry then your probably eating enough... don't tryand force the weight on... if you are 6 foot and 130 pounds you are 6 foot and 160 pounds... you don't look as slim as I'd imagined you would. you just have very little fat maybe condsider eating a bit more fat (polyunsaturated vegetable fats etc ) its actually benificial for your energy systems to have some fat stored on you.

It all comes down to how you feel at the weight though... if you feel strong at it... they'll be few other 130 fighters who can match the power of your straight shots... just make sure you tie the shorter guys up on the inside :P

Like I was saying in another thread to some other guy, you may be the same height as some one like say Tyson (more or less) but you won't get built like them (with out being bulky and slow) because you have a different frame to them, just work with what you have