Put some kays on it first. The ute got it's birthday after circa 2500km's and the removal of the mineral oil. Without a change of the front mount, I doubt 300rwkw would be reached. Even if it were to, the extra load on the engine isn't really advisable. Get a free-flowing kit like Kevin's and you will be laughing. With that, and the mods you've already mentioned, the ute makes 306 @ only 10 psi. Best of luck with the car, and enjoy its transformation over the modifications.