The patience and soaking are paying off! Most fasteners are now coming apart in a useable condition. A few are still too frozen to attempt to loosen and possibly damage. The fork rockers, top steering stem nut and riser nuts, intake valve pocket pieces, and base nuts all are now loose and removed for cleaning. The actual intake pocket is still frozen in the engine. This will require some heat (more than propane) to loosen after all the years of sitting.
Still a long way to go but this steady progress is motivation! I will be making (or heavily modifying off the shelf tools) in the coming days. Next to tackle will be the pedal assembly and removing handlebars. More to follow! Thanks for looking.