what size motor?
Depends on who performs the repair and if the head needs resurfacing or replacing. Get estimates from trusted mechanics.
possibly blown head gasket
There could be several things that will make your 2005 Grand Cherokee Limited overheat even if you just changed your radiator. There may be a head gasket blown.
maybe you need a new head gasket?
The 2010 Jeep Grand-Cherokee has 39.7 in. of front head room.
The 2012 Jeep Grand-Cherokee has 39.9 in. of front head room.
The 2004 Jeep Grand-Cherokee has 39.7 in. of front head room.
The 2002 Jeep Grand-Cherokee has 39.5 in. of front head room.
The 2008 Jeep Grand-Cherokee has 39.3 in. of rear head room.