Ok, I took a tape measure to the biggest piece-- 49" across at its widest on the small end. It's sitting on the big end. Looks like I will be making a few noodles!
I'm with the Savage here - horizontal cut, couple whacks with a maul, wedges if needed, though you may need to get up on a stump to swing. Wash, rinse, repeat.
There is no stump to put this on, no way to move it in it's current state. The biggest piece is 3-4 rounds still connected. It will get diced however it can be.
Can't take the truck that far right now, brakes, but that would be some fun wood to try out my huskihl rebuilt 660 and 32" bar.