1937 Maytag Engine model 72 rebuild #47

Picked one by one from a mixed channel. Transcript check: both title readers certain; 5 of 5 sampled certain picks confirmed by transcript, none failed. Channel rule: Include only the long-form repair, restoration, machining and build videos whose titles name a specific procedure (e.g. brazing, how to install or remove, shop-built parts, numbered repair-series episodes, how to build). Exclude cooking, chats, reviews, trips, and engine-running or acquisition clips.