Used to know a fella who got mixed up in a bad crowd..... drug deal gone wrong or something, he got fed into a wood chipper feet first.
Allegedly he was awake !!
Hang the body upside, slit throat and let it bleed out...... less gore.
Thats what I do with pigs and cows anyways, I assume same same for human carcass.
Would be no different to cutting up any other mammal, butchers do it daily.
I grew up on a farm and have slaughtered many animals to be put into the freezer.