Ummmm...We don't really know that. It's fine to make a guesstimate but that's all it really is. Contrast that with the fact that sans the dope, there is no way he would even be close to what he is right now. If it makes him feel better (and I doubt it would, LOL!) without his little helpers he would probably be stronger than I am. 
Actually, yes
From my own experience and being around some of the strongest guys in the gym (I am in Texas and train at destination and metroflex here and there)
Strength genetics, like physique, go hand in hand, you either got it or you don’t
Sure you work yourself into having a phenomenal physique or being real strong but the genetically elite with drugs will surpass you
Also, I am not claiming he will have the same strength naturally as enhanced, that’s a given, I was implying if he was off EVERYTHING, he is still VERY strong, that’s a given, by his genetics
The drugs DEF helped him in attaining crazy strength beyond his natural ability