Well, in test number 1-
Maybe not in that one test, but after being abused like that long enough the Front suspension on that 09 would be begging for mercy as ball joints, etc would be squeaking and creaking and eventually breaking, he 73-79's king pins would be holding steady and true. The plastic dashes and the like in the interior of the new truck also have alot more potential of rattling loose, big bolts and welds on the interior of the 73-79 hold togther better.
2nd test....
Ok, here the new truck might of beat the old one. The extra weight and wheelbase of the new one helped it out immensely, but i also think the old ones Somewhat stiffer springs woulda helped it out, call this one a draw.
3rd test...
Once again the new F150s yuppiefied springs in the back woulda hurt it with a load, granted it did hold up pretty decent under almost 1000lbs, but once again so would an old one, the twin i beam front would of kept the front wheels on the ground better too, and with an actual 8ft bed on the old one you could of centered the weight right behind the cab and spread it out over both axles. This one goes to the old one.
4th test, fuel mileage....
There is such large gaps in this one to call. The new F150's mileae stays pretty constant across the board, the old one, well, it depends alot on the gearing and engine. Obvisouly a 300 with 2.96 gears and a 3sp will do awesome, but a 400 with 4.10's and a C6 will suck fuel like theres no tomorrow.
No winner in fuel.
later,
Dustin