I have a 04 cougar FTD, 225 opti, I run a 27 trophy (2 plugs installed) , great when I am by myself half tanks on fuel, good hole shot, cruise at 60 mph at 4500 (4-5 MPG) or so, tops at 73 or 4. I also have a 25 power Tech, good if you have a load or dragging kids on a tube or something, but hits the limiter to easy. I really think the 26 of some type would be the best. MKG