Maybe an era shootout? Take a bike from each of the racing eras (possibly including a modern) and compare them, maybe even including lap times across a number of riders. Obviously, you'd want to comparably set up bikes, and you'd want the better bikes from each era (not much point in comparing a TS400 to an MC490...).
And yes, I'd be happy to supply bikes - could almost do a 125 era-shootout with bikes in my garage...