Got off the clock in my b110 coupe, fresh A15 - single 32/36 weber, 5 speed, exhaust, alloy rims etc. No doubt some speedo error - the dial was pointing at the h of "mph" at the bottom of the speedometer...maybe 190km/hr?
changed into 5th gear at 100mph (6000rpm) - road to Murray Bridge from Adelaide is perfect for speed runs.....3am to be safe.....