Front brake wheel cylinder removal issues

[buildinga55]

I cannont get the wheel cylinder bolt loose on the passenger side. This is the single bolt version that holds on the wheel cylinder. Is this by any chance a left hand thread? I have beat it, out the pb blaster, cheater bar, i even drilled a small hole in the top of the cylinder flange at the top of the cylinder hoping the pb blaster could penetrate the threads. I assume this is a normal right hand thread but would listen to any advise. Thanks