2006 jeep vs 2007 Chrysler 300 Hemi difference

I have a 2007 Charger RT with the 5.7 L Hemi. It dropped a valve seat at 140,000 miles. I found out that it was a common thing for the 5.7 Hemi built in 2005-5007 to do that among having other issues. I decided to get a remanufactured 5.7 Hemi from Jasper engines. They claimed that they corrected all of the issues with that engine. It has been two years since I replaced the engine and I have had no problems.
I hope this information helps with your decision about your engine.