Were you able to get it apart?
Just about. The trigger guard is stuck solidly to the trigger plate. I've tried heat, penetrating oil, etc. to no avail.
I'm likely sending this one up to Rust Blue in Natick Mass for a complete strip-down and evaluation of cost for alleviating the pitting of the bore. The stock wound up being completely broken at the wrist. The compression of the tang and trigger plate was all that was holding it together. The proper brass stock repair dowels are inbound today along with acraglas to effect a repair. I have a jig built to apply proper tension to make the repair invisible when done.