[hockeyhead]

First off, If a tree that large is weak enough to just pull it over with a pickup truck it does need to come down now. Secondly pulling it until it breaks is uncontolled and God only knows what will happen. Third, nobody on this site or any other site can tell you the best way to bring it down without seeing and surveying the situation, so calling a pro is the safe bet.
All that said I dropped 65ft hickory tree, 20" at the base, this past Sunday that was within 15ft of the powerlines on the front of our property.
This tree had been hacked up by the power company over the years, created snow drifts in the winter, and was centerpiece of the ugly corner of my front yard.
I dropped 3 major branches on the roadside of the tree to insure it wouldn't hit the powerline as it fell away and to improve the lean. Then I used two 100ft 3/8" steel cables, one end looped around the tree up 22' in a crotch, the other end hooked on the tractor drawbaw setup in the direction I needed it to fall. This cable had no tension on it at this point. Then I cut the notch, then I raised the cable with the tractor with no tension, then I made the backcut creating the hinge and drove a wedge into the backcut. Then I got on the tractor and pulled it over , never even spun a wheel on the tractor still in 2wd. She fell just where I need it to fall, didn't block my drive on the left and didn't crush the landscaping on the right.
I'm limbing it everynight after work and dragging it back to make firewood out of it