Graveyard Carz Season 5 Episode 7 Hemi Orange is the New Corporate Blue ( Air Date 2015-12-09 ) Genre Reality category. Overview "The ghouls begin work on Bill Goldberg's '68 GTX, Mark repairs some bad body work on a Challenger decklid, and Will paints Brett Torino's '67 Hemi GTX. When Mark sets out to paint the 400 Magnum and Hemi engines, Will challenges him to a paint off.".