Should be no problem. I towed a pretty heavy volvo on a dolly over some steep hills with my '02 naturally aspirated 4X4 and it had quite enough power. You shoud be cruisin' up the grapevine with your S/C truck!

Just keep in mind to definately downshift going down those long hills, you don't want brake fade. If your truck is an auto, read the posts about when you should turn off the overdrive when towing. In a nutshell, turn it off on any up grade becuase the transmission may overheat.

Turn off your Air conditioning when going up the grapevine.

Have a great time.