If you have a TJ that is lifted and you don't have a SYE your pinion must be parallel to the driveshaft.
You must have adjustable uppers to adj your pinion angle.
Most people drop the t-case to eliminate driveline vibes. This is a bad idea IMO.
License to kill gophers by the government of the United Nations. Man, free to kill gophers at will. To kill, you must know your enemy, and in this case my enemy is a varmint. And a varmint will never quit - ever. They're like the Viet Cong - Varmint Cong. So you have to fall back on superior intelligence and superior firepower. And that's all she wrote.