I am getting confused! Group 6 were prototype cars and were allowed to run without the wheels fully enclosed and the 2litre series were run as group 6. Group 4 became group5 and to comply wheels had to be fully enclosed and headlights, on Humbles car I made the headlight recesses oval, Tony Galland made the Red Rose cars retangular which became the works standard. Narrow strips were also added to the rear wheel arches as slicks protruded outside of the bodywork, this was remedied on later rear bodywork by Specalised Mouldings. I am sure this work was carried out before the 72 Spa 1000Ks. 2 front sections were used one with lights one without and the rear wheel spats removed for 2ltr series. From memory John Boot, Burton's man fitted the first adjustable spoiler to the rear bodywork, and of course all followed suit.
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