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1
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Engine controls MK3 - all European specifications, USA specification to October 1969
Cars with twin SU carburettors - European specifications to chassis number FD92803, USA specification to chassis number FDU75000
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2
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Engine controls MK3 - USA specification from October 1969 to November 1970
Cars with single Zenith Stromberg carburettor - from chassis number FDU75001 to FDU92803
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3
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Engine controls MK4 and 1500 - all European specifications from November 1970
Cars with twin SU carburettors - from chassis number FH3
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4
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Engine controls MK4 and 1500 - USA specification from November 1970
Cars with single Zenith Stromberg carburettor - from chassis number FK1