How well does the RAM 2500 6.4 Hemi tow?

I have a 2014 2500 6.4 3.73. Pull a 5er at about 9000 lbs, usually 5-6 times per year. Last trip of the 2018 season we went to Mueller State Park near Divide Co. elevation 9500ft. Did it get us there and back? Yes it did and averaged 8.9 MPG hand calculated which I was very happy with, especially with the wind we encountered. Would a diesel have done it better? Absolutely. A lot better. I have owned several HD gas trucks and a couple of HD diesel trucks. The last diesel was a 13 F250 6.7. Really liked the truck and the power but at the time we didn't have anything to tow. Life as a daily driver grocery getter was causing some emission related issues. The 6.4 Ram is a better daily driver especially with my 6 mile drive to work and faster warm up in the cold temps that we have in the Texas panhandle. We also have a lifetime Mopar warranty on the Ram which is not available on the diesel. A couple of the others were 2003 5.9 cummins SO 235 HP and a 2000 Ford V10. The 6.4 Hemi tows better than both of those. Since you are only planning on towing 8000lbs the 6.4 will get it done. I would definitely get the 4.10 gears no matter what weight you are towing. In my opinion, Ram shouldn't offer the 3.73 in the gas truck. Maybe with the new 8 speed they would be ok. If there is any chance you may decide on a larger trailer in the future, I would just get the cummins and be done with it. This is just my opinion based on personal experience. I'm sure others may disagree.