A jerry can & electric pump should get it started.
I would not recommend driving it home this way.
I'd drive it that way
If it were gasoline you'd wanna be careful
But Diesel isn't flammable
It's combustible
I'd probably take a couple good fire extinguishers anyway
Along with a spare tire and jack and good 4 way lug wrench
Tires are probably old and dry rotted
Strap the can in the bed and zip tie new flex hose in to the engine compartments either down and under the cab or zip it to the passenger mirror and under the rear of the hood
As long as it doesn't get pinched
If there's a return line just make sure it goes back into the jerry can also
I'd say the problem is in the line
It may have dual tanks. But they share a line and switching valve
A tiny leak will cause it to suck air instead of fuel
But to see if it runs ok with no smoke or knocks and the trans works ok. Brakes work ok etc Just strap a can in and hook it up
A lot of times on old Chevys the rubber flex lines on the front brakes swell up inside and the brakes will grab and not release
You need to check all that before you
Also consider joining AAA
Free towing up to 100 miles
If its more than 100 just get em to take you 99 miles and drop it at a mall or somewhere
Have dinner and call AAA again for another 100 mile tow
BTW. When you or the seller is cranking the engine
Don't run the starter more than 10 seconds and let it rest for at least one minute
Otherwise You will burn up the starter
If you have to replace the starter DO NOT buy one at an auto parts store
Find a place that can rebuild it
The ones from auto parts stores are just used ones that have been cleaned and painted and tested
They are not rebuilt
Also of you do get on your trip and the starter just clicks
Have a helper hold the key while you smack the starter with a hammer
This will usually get it working again
Temporarily
At least a few times to keep you from being stranded