i installed 285 75r 16 tires on my 04 with the 5.4 and hatted the pulling power and slug like bottom end. had 4.30 installed and its now like it should have been from the factory with no decrease in mpg. i would like a four inch lift with 35's but i dont have the money to regear again so it looks like im stuck with what i have. and i would install 5.13 with 40's it would be just about perfect.