Got it apart!
Texas, the boiling did not free the cylinder enough to turn but it did soften the crud holding the cylinder pin enough so I could drive it out by tapping the "ears" with a brass drift and small hammer.
bob208, Ballistics et. al. thanks again! Had I not got it, your suggestions were next on the list.
The bore/grooves are heavily rusted as are the chambers. I have all those openings plugged and filled with PB Blaster for a day or two. Any suggestions on heavy rust removal from these places? I've already ran a brass brush but there is much to go. Thanks.
Also, that cylinder pin as a flat milled in it. My disassemble/assembly book does not address this. Does it make a difference whether it is up or down?