Water-Bug wrote:
I tow a 2013 Montana Highcountry 32xxRL with my 2012 RAM 2500 6.7 Cummins with no problem. It tows level without any modifications. The only difference in a RAM 2500 and a 3500 is the rear springs. All the running gear is the same and the Cummins paired up with a 6 speed auto trans will do just fine with a 3.73 rear end.
The frame is different on 2013...in 2014 the 2500's got the new 50k psi cold treated steel frame that the 3500's have.
OP - you are going to be well over the payload capacity of the truck. FWIW, your 2500 megacab has 2017lbs payload...my 2014 3500 Megacab has 4076lbs and is the sole reason I ordered a 3500 vs a 2500 megacab
