I made a puller that would fit in the two larger holes that are close to face of the flywheel with a large bolt that pushed on end of crankshaft, see rough sketch. Lots of heat and finally a good clout with soft faced hammer and flywheel come loose with a loud bang. I had soaked it with penetrating fluid for a week or so before. Leaving the locking nut loose on end of crankshaft helps locate bolt on puller and protect end of crank from damage.
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