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Who on here has used a Ford crankshaft instead of the Mazdas MZR crankshaft?

Quick question about the crankshaft... is it the one from the Focus RS or Mustang Ecoboost that can be used in the Mazdaspeed? Are there any differences or advantages\disadvantages of using the Ford crankshaft? Quick question about the crankshaft... is it the one from the Focus RS or Mustang...