Hi, new here and trying to help my parents get their jeep back on the road. Its a 2002 liberty sport with the 3.7l They were told that the engine is different than a 2003, but everything I could find shown that the engine is the same up to 2004 changing a bit in 2005. It needs a head replaced and the number 1 piston replaced. I glanced at the head and it for sure has a bent valve, broken valve seat and some other damage which may or may not be from my cousin trying to work on it for them. I was told the lobe was worn down on the cam, but have not seen it as it had already been taken apart. It also got the piston pretty good. So heres my question if as they need to keep the cost down. I would just like to double check that a head will fit from a 02-04 engine and if they decide to go the other route will a 02-04 engine basically drop in?