I do have some early material that the PO gave me. I've read through this thread several times, good 383 stuff!!
I think you met my friend John sitting with me. That's Rocky JS in this thread.
Might be pre-production. The linked article isn't clear about dates or which parts are quoted from the original print article. The comment about the K-H rims is just wrong. The test car might have had Mag-stars (never used in production) or wheel covers, but not the model year 1969 rims that were recalled.