When I went to Pakistan to recruit guys to come work for me In Kuwait, guys like the ones in this video were the ones I sought out. They know how to work, were not afraid of a little hard work. and they could do more with less than you can imagine.
Don't let those sunglasses fool you they are about a shade 7 or 8 more than dark enough for persons with black pupiled eyes welding with 2.5to 3.5 mm 6013 rods at around 75 to 105 amps. But you will see a lot of guys weld without glasses for short periods of time.
Most of the trucks that will have that type of fuel tank will be top draw the supply tube will not extend all the way to the bottom of the tank