my mate has a courtenay 280/260 conversion in his nova and believe me when i say it will beat you all day long nerih, at any speed you choose to challenge it at! like rob says, its all about power to weight, and yes, his nova will crack 150 as well so thats not a point to play on eithere! tho its not my cup of tea, i do admire cars like that from other marques.