There's only one rule: If you have three road racers from the sixties, just drive the crap out of them.
A Volvo Amazon might look like a large family sedan, but they had a "Polestar version" back in the day winning the rally championship three times in a row. How about that for a daily driver?
MGB's on the other hand look exactly like the sort car you would push until its engine blows up. Your mother wouldn't like it!
Last but not least, a Sunbeam with a high-performance Shelby V8? Get my sledgehammer! We got some work to do...