Big Block ticking? Flat tappet cam. Normal?

So I watched a video on youtube where the guy removed to spark plug wire to assess which cylinder was causing the noise. Any thoughts on that method for my noise. To me it does not sound like rod knock. I want to also check the transmission cover plate. I had an issue with it hitting before and I got a new one installed. But i never ran it since the install. I hope that this is just a dumb mistake of the flex plate bolts hitting the cover. The flex plate is one of the bigger, thicker SFI race plate. So the bolts stick out a bit. Fingers crossed.