re: 60 MPH...achieveable? Who cares?!? Let blueprint an engine!
I know a man in the local Wizzer club. He takes blank head castings and machines them. his bike biulds are VERRY fast. the first thing he does in a biuld - rims and tires. HD drum brakes, thicker spokes, HD tubes. Going fast is easy, doing it safe is important. a good street rod has 3 important things to consider, brakes, steering/suspension, and motor( in that order.)