long distance towing questions with 1978 c30 3+3 dually

[stephen p]

I posted this thread, and came to the conclusion that it was a bad idea with a half ton... http://67-72chevytrucks.com/vboard/s...86#post7866586


So I've run up on a 77 or 78 c30 camper special 3+3 dually 454, th400.. i can get it cheap, motor is seemingly sound, recent rebuild, for whatever reason, it has a torker intake (low rise single plane) that i will probably switch out for an older stock dual plane. I'm assuming it probably has 781 heads. I can get it cheap. Here's where I'm at. As explained in the thread, I'm moving from jackson ms to portland or.. i have to haul my kz1000 motocycle, tool box that's 700 lbs unloaded, random misc stuff, as well as my 69 swb c10 big block truck, on a u-haul trailer.. I've got a 2004 ram 1500 hemi quad cab, but there's no way i trust the dodge to go 2500 miles with that kind of load, especially being a high mile truck. I can also fix the old chevy on the side of the road, even if that means a Craigslist engine or trans. Provided the c30 is mechanically sound, would it be up for that kind of load and distance? It should be a 3.73 truck. Would 70 mph be out of the question? Im guessing in can expect around 8mpg? Shipp9ng my stuff is out of the question, and I'm getting the truck cheap enough, I'm pretty sure i could quick sell the truck and profit once I'm there.