GSP has stated that a move to 185 would be permanent and he'd stack on 20lbs of muscle in order to do it. Frankly, I don't know where it would go...maybe in his carry on luggage or something....Silva vs GSP is a bad match up for GSP. Silva is HUGE compared to him. They would meet at like 190 as their catch weight. GSP would give up close to 20 pounds and several inches reach. He's not going to take that fight.