That’s a good question but I tell you what, equipped the way I outlined and with 411 gears and good rubber on the rear those little 57 Chevys won hundreds of street races back when there were fewer cops and they did not take themselves so serious.
The 69 Z28 had a small block that displaced 302 cu. I don’t know what path they followed to get that number but it was a wicked little motor. Not that many built and worth a bunch if you can find one.