It's really a regional thing, but generally speaking since the last 4 years did happen, 8 grand is fair.
It's gonna cost you 2-3 to do it yourself with hard to find parts and a bunch that need to be done a second time because pushrods bend, I'd use the shop,
dyi thread. Many guys are coming back with well over 8 grand for this, dealers getting as high as 12-13.
For ishts and giggles I would call every local independent and ask them what it costs to drop a 5.7 jasper in there with or without delete MDS. Bottom line you have maybe the best year ram ever made for a hemi, I personally think so some disagree, whatever. You have 3.92's? I bet you do and I bet that is what the trans is so solid, if indeed you do have 3,92's and the 2012 with the 68 rfe it is worth saving.
Generally speaking you don't go from limited ability to dropping an engine in one step, but it is all about time and research. I never want to say cant, especially since cam jobs are hit and miss with pushrods.