Well the Cobra is home now and a different car it is. Feels like someone has removed about 10 kilos from the flywheel. Now is much smoother to rev and faster to do so and has a great deal more power. Cruises at fewer revs and the exhaust note under acceleration is fantastic with the bigger ports. Nice slightly 'cammy' idle as well. Wires and cables moved to less obvious locations. Very pleased! Now to get those wheels cambered properly at the rear!