1970 COE freightliner 8v-71

Leaving out of Eatonville Wa. to head to the 2013 Yakima ATHS national convention. This is a 1970 3 axle with a 8v-71 (318), 13 speed fuller. Seems a bit slow but I am hauling a heavy trailer, jeep, and another very heavy GMC 3 axle, weighing in at about 55000lbs.