Ford speedo's lol
Unless you had massive wheels your power would be dropping off (not saying you'd hit the limiter) before 100mph in 3rd, most cossies will go well off the clock (past 170mph) too but in reality they are bearly over 160mph

granted
i did pull 7k in 5th a few times and speedo showed 160 so was spot on
rev limirer was 7k on stu's chip