Randy, after towing this over the Coquihalla in from the Vancouver BC area to Edmonton, I wouldn't be too worried about power. The 3FE is a real trooper, it may be slow, but it is solid as a rock. The combined weight was around 8000 lbs IIRC, and there was only one spot on the whole trip (700 or 800 miles) where the truck couldn't hold 45 or above. That said, getting the power from the engine to the road with some efficiency is going to be a big deal. Make sure you are geared properly (I did this with stock sized tires) and if you are going to tow a fair bit, it might be worth looking at the extreme VB to get lock up in 3rd (I've got one). I'm assuming you already have an ATF cooler.