I checked, they do run seperate big ends at 180 degrees so theoretically one should be able to pop loosened cylinders.
Came across some excellent sites, you maybe know them in any case.
Good luck and keep us updated.
Oh yes. Can you get to the big end bearing caps from underneath.? If you remove the caps you could then remove the cylinder with the piston and conrod as a unit to be pressed apart. At least you could let the cylinder stand on end for the penetrating oil to do its job.