Hey all I know that pull ups are the essential exercise to a bigger back. I am one of those people that has never been able to do one. I am working hard to get there and I was looking for input / help on what exercises or back routine I can use to get there. This is one of my main goals in 2014.

I am 270lbs(used to be 400lbs)so I have gravity working against me. Any help help is greatly appreciated.