I have a 2000 2.5L ATX with mods listed below, and I'm planning to swap in a 3L in the coming months. I'm looking to keep things as simple as possible - going to use my current 2.5L heads/intake and everything else. Which 3L Duratec engine would fit with the fewest modifications?

Thanks!

2003 Mustang GT 5-Speed, FMS 4.10 gears, Dr. Gas O/R X-pipe, Flowmaster cat-back, BBK CAI, C&L intake plenum, Accufab 75mm TB, Steeda Timing Adjuster - 13.70@102.23 (SOLD) 2000 Cougar V6 ATX with many mods - 15.93@86.97