The Boss 429 was Ford's answer to Chrysler's 426 HEMI that dominated the NASCAR series following Ford's attempt to get its 427 SOHC engine approved for use. Much like the Boss 429 was developed ...
The Boss 429 was known for being a stand-out model for Ford back in the '60s and '70s. It was purely a homologation model that Ford needed to be able to race their new engine in NASCAR.