Just be thankful anyone wants to build performance parts for these, "no longer made" cars. Most don't in today's world. No real profit in it long term. I am glad someone stepped up to help the N/A crowd out. Hats off to Bell Experimental...
As for the headers. I stopped by a fab shop near Indy awhile back. They will fab up headers for anything, and I mean anything. My quote was $1500.00, and they do an excellent job. I am just not into headers. I gave them up in the Camaro years. I did a set on a vette once, and said I would never do that again... Just more problems than they are worth sometimes for the small HP gains. Again, glad the turbo build is going well. Good luck you guys.