I currently have a P-120 installed in mine and it is more than adequate power for the F-4. I can't tell a difference with the wing tanks on it. I also have 6 MK82's to hang under the wings but have yet to fly with them. I do have a P-160 for mine as well but have been having far too much fun with it on another airplane. There really is no such thing as too much power with the F-4. With everything down and dirty it's a pig!

DR