If you have to use a truck to rip it over, then your doing it wrong. If you have to use wedges to make it go, your doing it wrong. If you have to use those things to lay something over, then you shouldn't be doing it. Proper notching, reading the wood and understanding what you are looking at is key. Go watch a pro, see how he does it, as every tree is different. They are all conditional. Read up on holding wood. A regular hand line is fine, you shouldn't need anything bigger. If you do it right, you can cut your notch and your back cut all the way to 10%, the tree should stay, unless it is a big leaner or has a huge amount of weight to one side, but if it is close to balanced, it will stay. If it starts to go before you get there, stay there and finish the cut. Lots of guys bail at the first sign of movement, then they leave holding wood thick to one side and the tree turns to that side as its going. Bad things happen then if you don't commit. If ya do it right, then with a tag line, you should be able to pull it over (by hand) with ease. There is much more too it than a saw and a truck. It wouldn't hurt to go stay at a Holiday Inn Express either. I use sticks to keep the cut open when cutting up a log, I don't want to "wedge it" to keep it open, that puts unneeded tension on the wood as you cut it. Just find ya a stick that is the same size a the cut and shove it in, keeps the bar going thru with ease, keeps the cut open so the bar wont pinch and ya wont nick a chain if you have metal wedges. I never try and cut all the way thru a log on the ground, go about 80% then roll it. Keeps that chain clean and sharp.