6.4 in an e body questions

I’m starting my swap, I’m looking into tti headers. The only set they have that will work with stock k member and air conditioning say that a borgeson box is required but they don’t specify If the borgeson box is only required for a bodies or e bodies as well. Can any e body swappers chime in on their setup ?

Its best to call TTI directly. I have a borg box and ac, the headers I have don't remotely clear the box.