My ten cents worth.
A big brute 360 Husky. Friend of mine in early eighties,rode one past us on the footy fields we used to hang out on.
It was the quickest thing; with the most ear shrieking sound when on the pipe over flat ground, that I'd ever heard, at that stage of my life. Seen and heard 465s,480s and the like, but,this thing just had wings.