These were built with a 4 5/8" back space, 4 1/4" is considered optimal. The color is not quite correct but the wheels do balance true. The sixth one is in fact 4 1/4" back space, asking $100 each, the stainless inserts are also available at $6 each. Accent Insert - Styled Steel Wheel - Stainless Steel - Repro ~ 1969 - 1970 Mercury Cougar ( 1969 Mercury Cougar, 1970 Mercury Cougar ) at West Coast Classic Cougar :: The Definitive 1967 - 1973 Mercury Cougar Parts Source
