I went hog hunting in Texas close to 6 years ago and they are some tough and mean SOBS. Our guide said their hearts hang low in their front chest and their sides have a think gristle, you almost have to hit low in the sides to take the heart. I was able to hunt at night with a red lense on our scopes under a full moon, what a rush that was. Here is an excellent reference I used while hunting these hogs.
http://www.texasboars.com/anatomy.html
By the way I smoked all of my meat slowly with plenty of smoke for around 8 hours and you will have some of the best meat ever. I soaked the meat in garlic butter before putting in the smoker, my juice bowl above the heater had a mixture of water and liquid smoke for flavor. Good luck.