I too doubt that you'll pull a pine root ball up, at least unless it's well soaked.
We've snapped off an oak about that size with our deuce, but it was being pulled from the top. One tree got cut and tipped onto another tree and got stuck there. We chained up the bottom of the cut tree to pull it loose. Apparently, the two were stuck together, because when we pulled, the second tree snapped off at ground level and they both went down together.
I've snapped 1/2" cable doing this, so now I only use a chain (But I've got a big-a$$, long chain). Less snappy when/if it breaks. It also works better with a load on the truck, as it increases both traction and momentum.
Make sure everyone is a LONG way back and give 'er.
Good luck. Oh yeah, like someone said, take pictures!!