Without a photo of your transmission, I can't answer your original question. If your 200-4R had 10 bolt holes (+2 for the alignment dowels) then you have a dual pattern. If it only has 6 bolt holes (+2 for dowels) then it is BOP only. I don't believe there is a Chevy only version. I have seen, with my own two eyes, dual pattern AND BOP only pattern. I am 100% sure. Hope this helps.