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Don't know how doable it is, though could the European Touring Car Championship / ETCC have ever evolved or spawned into an alternate World Touring Car Championship / WTCC starting from late-60s / early-70s?

Am envisioning a wide variety of touring cars of different sizes and engine displacements being allowed to race together from the likes of the small Fiat 500 and Hillman Imp to large Jaguar's or Mercedes's along with various "Muscle Cars" from America (as well as in places like Australia, South Africa, Brazil and the UK).
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