Hopefully you dont have an accident and hit someone else while you are trying to sort it out. The truth is I bet if a really good shop inspected your truck then they wouldn’t be able to legally let you drive it away without the advised repairs being completed.
All that matters functionally is that you have the pre cat 02 sensor and any muffler shop can add that for you no issue there. The post cat 02s can be deleted as you aren’t running cats and you won’t have any issues with how it runs but it could set off a check engine light. Not a big deal just...
I would simply wait for the gentleman on here who’s got the parts you need if you want 4” vs 3”. How much are you raising the front and do you want it raked out or level? The rear is normally 1.5-2” higher than the front.
I wouldn’t mess with the spring pack, just buy the blocks you need. You...