Ian,
With respect, this is not the point. The MSA’s historic motorsport definition is very clear: “Competitions under a set of rules that preserve the specification of their period and prevent modifications of performance and behaviour.......”
Three wheeling, no matter how achieved, is a modification in behaviour. There only two ways it could be shown not to be a modification in behaviour:
By providing evidence that Cobras three-wheeled in period, and demonstrating that Friedman/Christy’s 50+ race Cobras cornering at the limit photos don’t show the full storyBy providing evidence that today’s drivers can get their cars to dance in ways that yesterday’s (Bondurant, Sears, Gardner, Miles etc) couldn’t.
To repeat, I simply do not see how a car that three wheels now but didn’t in period does not have modified behaviour; further, I can see no reason to modify the Cobra's behaviour other than to achieve performance gain.
What, therefore, is historic racing, if it isn’t racing cars as they were? Perhaps the three-wheelers (Ian, Andy + any others) could come up with a succinct practical definition that would put this more recent behaviour into the 'historic' category.
RS