If you just want to look bigger, train for hypertrophy. Higher reps (8-12) and a slow tempo 4:4 will lengthen your set times and therefore time under tension for your muscles.
I have long limbs too, especially my legs, so I know the feeling. If you were to shorten your limbs you would probably look tanked, but that's why most guys with larger frames look far better than others once they pack on some size.
1. Start with hypertrophy, then move on to hybrid training later as me and Joe explained.
2. Stop doing chin ups and push ups in your "off days". Those off days are there for a reason... your body requires that time to rest and repair. If you keep breaking down fibres when do you expect them to repair?
3. Increase your number of training days. This will allow you to double up on body parts. Try something like a 4-day split (upper and lower body). No, this won't be too much because if you train for hypertrophy you will relieve your body of the CNS stress associated with strength training.
4. Squat and deadlift. Build these up slowly to avoid re-injuring your back
I guarantee you will build some size doing this while you eat big. I have an equally hard time gaining muscle weight. You could easily just gain weight as other have said by lowering calories expended. I'm not lean, but at least I'm gaining muscle as well as fat. Last I checked I was about 89kg @182-183cm. I'll check tonight and re-post.