You will need to bring the compression up in that engine,it will be dead especially with alluminum heads ,the overlap of the cam will kill the torque,there is no cylinder pressure with a cam like that and no compression,you would be betterwith stock large oval ports with some flow work ,on your combo. Ive done oval ports that outflow rectangular heads and they will rip a house down with the torque they make,which is what you need in your combo.