Might I recommend a set of "larger than normal" wrenches and perhaps a 3/4 drive socket set. These 3 ton trucks have some really large fastners. I've used up to 1 1/8" when servicing the hydrovac unit. And the lug nuts are like 1 3/8". You might want to have a tire shop brake them loose for you, then tighten them up with whatever you carry so you won't have any surprises on the road.
Oh and my '52 450 COE with a 302 and the Clark OD is knocking down 4-5 mpg and 47 mph tops. Just something for you to figure on.
Scott