1. If you can't get the TSB for free, don't bother. Toyota leafs are overpriced underperformers. I just looked at TRD parts 4u, and even there, they are $432 PER SIDE (they didn't designate whether it is the 3 or 4 leaf pack, but this gives you an idea of the price) If you can still get it free-might squeek by under 36K, get it done and see how you like it.
2. If I were you, I would probably call Alcan and have them make you a custom leaf pack. I don't know where in Utah you are, but Alcan is in Grand Junction CO, you could drive there and pick them up. 5100s are supposed to be good for 0-2" of lift, the dakars supposedly give at least 2.75" of lift.
3. You may end up with drive shaft vibrations, you may not. Lifting changes driveline angles which can throw rotating driveshafts out of balance and lead to vibrations. There are things you can add (shims, carrier bearing drop kits, etc) to try to correct this. Bring it to a 4x4 shop and have them do it. There are no guarantees, some people are more sensitive to driveline vibes than others. If you really want to lift, go for it. If you don't care about lift get a custom after market leaf pack, it will likely be cheaper than Toyota's 4 leaf pack.
Edit: Oh, your truck is an '05, past 3 year warranty. Still worth a try. Good luck.
2. If I were you, I would probably call Alcan and have them make you a custom leaf pack. I don't know where in Utah you are, but Alcan is in Grand Junction CO, you could drive there and pick them up. 5100s are supposed to be good for 0-2" of lift, the dakars supposedly give at least 2.75" of lift.
3. You may end up with drive shaft vibrations, you may not. Lifting changes driveline angles which can throw rotating driveshafts out of balance and lead to vibrations. There are things you can add (shims, carrier bearing drop kits, etc) to try to correct this. Bring it to a 4x4 shop and have them do it. There are no guarantees, some people are more sensitive to driveline vibes than others. If you really want to lift, go for it. If you don't care about lift get a custom after market leaf pack, it will likely be cheaper than Toyota's 4 leaf pack.
Edit: Oh, your truck is an '05, past 3 year warranty. Still worth a try. Good luck.