Stick a jeep inline 6 in it and drive it another 400k miles then sell it for a couple grand. The inline 6 is bullet proof, will run forever.
Problem #1- 4 liter inline 6 wont fit in a 2011 GC-engine bay too short
Problem #2-4.0 wasnt offered in 2011 so retrofitting the ecm would be cost prohibitive even to DIY
stick a good used motor in it and be done