I agree with Kayteg1 and Grit dog. If the truck is running a feeling good when at high and low speeds your most likely ok. The brackets do look like Torklift I have on my truck.
As for tires.... you can break the cords in your tires very easily by over loading your truck “ over loading” and leaving it sit say in your driveway with a full load of Green Larch firewood. I know this as I helped my neighbour a few years back get firewood one Saturday morning and when we got back home it was drizzling... he didn’t want to empty the truck cause he was made of sugar I guess. I told him what could happen.... he didn’t listen....
Sunday evening he unloaded the truck, Monday morning he hopped in the truck and took off for work... 5 minutes later he was home again.... both back tires were toast...
All the air bags extra over load springs in the world won’t help you if the tires can’t take the load...
A good quality E reated tire is your friend
Soup.