I had two very narrow needle nose pliers
and a pair of narrow hemostats in my soldering kit.

I used the needle nose to break off the tang,
but the hemostats will also work, especially in even smaller diameter holes.
The hemostats I have are for creating temporary heat sinks on delicate electronic leads,
not medical ones for clamping off blood vessels..

In this application the 8 mm small head pan bolts are so short
that even fully screwed in only to the transmission housing
without the extra metal thickness in the pan
they do not bottom out against the tang.

In the first hole I just did
Mother Mopar very thoughtfully placed a brace close by that prevented me from rotating my tap handle 360 degrees.
Mopar engineers are good at placing those braces “just so.”