I’ve got nothing but good things to say about my 7.3. It’s pulled everything I hook up to it with zero issues. It’s been tuned with 5Star since I got it and never had any shift issues at all. I run the 87 Daily Tow, change the oil and rotate the tires. Mine rides rough but I keep 75# in the rear, have bags, heavy front service suspension and camper package. The 7.3L is a strong engine for a gas choice, get the 4.30 though.