Our '04 2350 has a V10 and a 5,000lb hitch so we decided to tow our 1965 Sunbeam Tiger sports car from Southern California to Rapid City, SD for a big Sunbeam get together. We borrowed the trailer and had the rig fitted with an electric brake controller.
With the trailer loaded we were close to the rated capacity, but the rig towed well at about 65 m/h on the level. We made the mistake of going through Denver which involves crossing the Rockies via the Eisenhower Tunnel in excess of 11,000 ft which is right at the performance limit of our PC/loaded trailer combination. We just made it over the top in 1st gear. On the way back we went via passes into Salt Lake City; at about 8,000ft these were a lot more manageable. I have no doubt that without the trailer the PC would have done fine on I-70.
Bill and Carol Rogers