can i get 5.9 and put in my place of my 5.2 my main concern is will the 5.9 bolt to my nv3500 5 speed or will i have to get a nv4500 to put in its place and will the wiring and stuff be the same i no i will have to switch the computer would that switch be worth it or do u think i am better off doing internal work to my 5.2 I'm looking for more hp and torque around 300 horse or so at the rear wheels but still try to keep the gas mileage good any suggestions would be great