The Custom Barracuda is one of the first Sixteen Hot Wheels cars produced in 1968. They are known as the Sweet Sixteen. This model was produced in 1968 at the USA and Hong Kong factories. "Hybrids" are known to exist, which used a mix of both USA and Hong Kong parts. Unlike most early redlines, no Custom Barracudas are known to have a black painted roof. USA cars can be found with Tan, Grey and dark charcoal, HK cars can be found with white, brown, grey, silver and purple interiors. USA cars have clear windows and HK cars have blue tinted windows. USA cars have shorter power bulges on the hood than HK cars. HK bases are more detailed (and have 4 square holes) than USA bases. All Custom Barracudas have delrin bearing wheels and some early HK cars have 'deep dish' wheels on the front.