This car was extremely unsuccessful, and later reverted mostly to conventional 721 form and was used by John Watson to make his F1 debut for John Goldie's Goldie Hexagon Racing team.
Este coche foi pouco exitoso, e máis tarde volveu á forma convencional do 721 e utilizouse por John Watson para facer o seu debut na F1 co equipo Goldie Hexagon Racing de John Goldie.