First 250 mph bike used small block Chevy

[Franklin]

When thinking about how back in 1970 Don Vesco needed two engines and the Bonneville salts to be the first to break 250 mph on two wheels with bike motors, I remembered how the first rider to go 250 mph on two wheels period was Johnny Allen back in 1963 when he clocked 265 mph through the mile with Stormy Mangham's "Big John" unblown small block Chevy bike liner.