If you aren't saving the tie rod, use a pickle fork. either way, leave the nut on up to the end of the shank so when it pops, it doesn't fly up and hit something, or you. The more humane way to save the critter is to turn the nut over and install it back on the shank even with the end. This is so you don't decimate the castle cuts. Use your biggest Chevy hammer and blaze away on the bottom. It will come free. Maybe prep this first with some lateral pounding on the side of the knuckle to jar it's set in the bore.
Measure the distance from the adjuster to center of zert, (since different mfg don't follow same length and end of thread cut). Replicate this distance with tape when putting in the new tie rod end. Don't disturb the position of the adjuster on the steering connecting rod. This will get it real close. Torque tie rod end 40-50 ft-lbs.