I had to take a minute to look it up. That is a good looking truck! I'm a sucker for anything old school.
Wikipedia listed standard power for that rig as a 427 gas engine. I know they can make anything pull with enough gears, but I agree with Sam that you may find yourself wanting for more power, especially if you plan on any trips through the mountains.
2006 Renegade/Freightliner Coronado 43', Detroit, twin screw, 12spd
2001 Ford Excursion PSD
2017 Ford F450