So here's the starter I ordered through partsgeek, PN: 17932N.
https://www.partsgeek.com/ss/?i=1&ssq=17932N
The mopar PN
@racerjoe referenced looks identical to the mancini one for sure. I'm wondering if the brace that bolts below the oilpan on the 6.4BGE is whats causing the issue. I have returned both the Partsgeek starter, and the autozone starter and ordered the Mancini one which already shipped out to me today. Hopefully I don't have to return it as well. If I do, I'll attempt the mopar one referenced above and if needed clearance the block and the brace. Hoping to avoid removing the headers as I installed them with a high temp RTV already per TTI's instructions and I also don't want to have to do touch up paint on the block. Oh well! Keep ya'll posted for sure.
Mike
