Editing Ford 385 engine (section)

====Boss 429====
[[File:Boss 429.jpg|thumb|250px|The distinctive enormous valve covers on a [[hemispherical combustion chamber|semi-hemispherical head]] Boss 429 engine]]

A race-bred "[[hemispherical combustion chamber|semi-hemi]]" version of the 429 was developed for NASCAR competition, and installed for homologation in the [[Boss 429 Mustang]].  This was a very different and much heavier duty engine than the standard 429, and distinct from the two high-performance wedge-head Cobra Jet versions.  Designed to compete with the reigning most powerful street V8, the [[Chrysler_Hemi_engine#Second_generation:_426_1964–1971|Chrysler 426 Hemi]],<ref>[https://www.hotcars.com/boss-429-and-426-hemi-compared/#:~:text=The%20Boss'%20Emergence,base%20model%20inline%2D6%20Mustang. Here's How The Ford Boss 429 V8 Compares To The 426 Hemi], hotcars.com</ref> it featured aluminum heads and intake manifold, a stiffened engine block, and many race-spec internal upgrades.<ref>[https://heacockclassic.com/articles/fords-boss-302-boss-429-mustangs/ Ford’s Boss 302 & Boss 429 Mustangs], Heacock Classics</ref>

The Boss 429 Mustang and [[Mercury Cyclone Spoiler II]] were the engine's only street application, but it competed in NASCAR installed in various Ford and Mercury products, including the Cyclone Spoiler II and later builds of the [[Ford Torino Talladega|Torino Talladega]].  It took home 26 winner's trophies in 1969, before factory support was curtailed going forward.<ref>[https://www.hotcars.com/legendary-60s-muscle-cars-that-took-nascar-to-streets/ 10 Legendary '60s Muscle Cars That Took NASCAR To The Streets], hotcars.com</ref>