Just to mention, this Kickstarter includes a Swords & Wizardry version as well as the Pathfinder one. That should work as written with any Classic edition, and convert to 1e on the fly.
https://www.kickstarter.com/projects/froggodgames/quests-of-doom-pathfinder-and-swords-and-wizardry
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https://www.kickstarter.com/projects/froggodgames/quests-of-doom-pathfinder-and-swords-and-wizardry
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