We specialize in locating used automotive engines, by distributing engine requests to a nationwide network of auto salvage yards and surplus engine dealers.
http://www.used-auto-engines.com/

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http://www.salvageauto.com/

Shop online for auto body parts, bumpers, headlights, taillights, wheels, rims & engines. Locate used auto parts, salvage yard parts and recycled truck accessories. Connect to salvage yards and used car parts dealers instantly. [...]
http://www.automotix.net/bargain_cars.html

Specializing in hard to find and no longer available stock parts for Johnson, Evinrude, Gale, Chrysler, Force, and Mercury outboards as well as OMC and Mercruiser sterndrives, engine parts and Chris Craft inboard V8 engines.
http://www.sea-way.com/