How much does it typically cost to go to a Hemi? I have a 2011 Rubi

 

$20-25k is typical.

 

If you buy an adapter kit you should be able to do it for $14-15K. Lots of work to do this as I did the LT Chev and it has taken a long time in what little spare time I had. Plus the cold garage I work in.
Here is a rough budget to go with;

• Adapter kit (complete) $5500-6500
• Used 5.7/Tranny $5000 (I got a 2016 Chev 5.3/8 spd Auto/ all accessories/wiring harness/ECU/TCU with 16,000miles for $3500 + 700 for shipping)
• U-joint new driveshafts $1000
• New exhaust $700
• Adapting AC to Hemi $500
• Suspension kit (Good one - got to hold up that extra weight) $2000
• That myriad of nuts, bolts, clips, brackets etc $500

Hopefully this helps. And that is with the smaller motor using the Jeeo rad. Go bigger engine and add another $6-800.