Its just a thought really Gerald, I'd personally love to see a field of old original cars all running together, even though they may not have all raced together in period. My reasoning for the non-slick thing would be that slicks were only just being introduced around the time of the cut-off period I gave, the vast majority of the cars on the list above would never have raced on slicks in period.

The performances of the cars listed above wouldn't be that vast, even the V8s would not be fast cars. Consider where the Segedin Mustang was when the Rat was driving it last year, or where the Dawson Mustang was at this years event in relation to your car. I'd hazard a guess your Mini would be one of the fastest cars in the field, with you at the wheel (assuming you haven't sold it?).

As for rollcages, well thats something quite outside the powers of anyone who creates a historic racing class. Anything to do with safety is governing body territory.