 The longer stroke of the 1,682 cc engine made the unit slightly taller than the smaller engine fitted in the 1300 GT which necessitated a ridge along the center of the bonnet/hood.Matters were simplified by specifying the same bonnet/hood ridge for all GT models regardless of engine size from the September 1965.The 1700 GT was also homologated for sale in the US, which was then a lucrative market for European sports cars.