chadwick35/04

I have a 2004 subaru legacy 35th anniversary edition sedan and I am coming up upon 30k, and I am getting ready to have my 30k done now, I have had the air filter replaced at my last oil change and I do not need my tires rotated or rebalanced due to new tires and a four wheel alignment. Now I thought that the spark plugs on the 2004's do not need to be done till 60k and I know the fuel filters on the 2004's are internal and do not need replacing also they are good for the life of the car. So I am having all the fluids replaced such as transmission,brake,coolant,oil,rear diff and the pcv valve replaced also. So if someone could let me know about the spark plugs I would appreciate it! I think other than that the 30k will be complete and I will be ready before winter comes, anything else I should do let me know thanks all!:

I was wondering I have 2004 subaru 35th anniversary edition sedan I was wondering if I put outback sedan struts in it and I was wondering how it would look and if I could do it?