New starter won’t fit due to headers

Yep, just as with brian6pak, the mini starter would not fit with my old hooker adjustables either. If your headers are old enough, the mini will not clear, for the exact reason you have found. There are tubes routed through the space where the new mini is, cause the old starter wasnt there.
I believe summit offers a new version of the old full size starter. It wont be as cheap as the modern mini.
Newer design headers, like tti, are designed to clear, and require! the mini.
Summit offers an OE for $168. There is always rock auto, but i dont deal with any company where i cant talk to a human.