I'd love to race these on a board track. I'd put together an motordrome replica in a heartbeat and go on out there. But I gotta say, there's a modern convention I'd like to retain on my own bike: brakes! As we've learned with the 2-smokers, you can live without a transmission. Kinda need the clutch if you got the brakes.
But I've got good brakes and I'd like to take 'em with me onto the track. Maybe it's not EXACTLY how they did it back then, but I'm just not as nuts as I used to be. (Must be getting old.)