We towed our RP 175 a few times with an '07 Dakota QC 3.7 v/6 w/tow package, 3.92 gearing and a 4800 lb. tow rating. It didn't suffice for us. The Dakota had a 4 speed transmission, and locked out 4th for tow. We then towed in 3rd as our tow gear. The 3.7 didn't have enough horses and torque to tow in 3rd on almost any hill. It would drop down to second and have to run at 4000 rpm or better with nothing in reserve to crest the hills.
With a fifth gear, more torque, and a few more horsepower the Dakota would have been a great tow rig for the RPod, as the trailer really followed the Dakota well. So, I think, with the 4.7 v/8, a Dakota would be a great choice. I would only consider the Dakota V/6 if you're a real flatlander, which unfortunately we're not here on the left coast.