uneven BC muscle?

Is it possible to have an uneven BC muscle? I mean can one side be stronger than the other? Would this cause a tilt of the cock or make it uneven?

I guess anything is possible, but I’d say this is highly unlikely. Curves or distortions of the penis are usually due to defects in the tunica albuginea, not uneven muscle development. What causes those defects I can’t say. In some individuals it might be Peyronie’s disease, in others trauma. Or it could just be “one of those things” that has no obvious explanation.

Any special method to correct such curves?

Many have tried, but I suspect few had succeeded. Jelqing “against the curve” is often recommended, but the more I read on these forums about fixes, the fewer I find effective. A search for “curve” while limiting the search to “titles only” may help you find older threads on the subject.