The nickname "J-car" came from its construction to meet the new Appendix J regulations introduced by the FIA in 1966; the redesign resulted in the abandonment of the original Mk I/Mk II chassis.
The nickname "J-car" came from its construction to meet the new Appendix J re.gulations introduced by the FIA in 1966; the redesign resulted in the abandonment of the original Mk I/Mk II chassis