What happened next.
A support tool made of square tube, thick end plates is bolted between the engine mounts, and the outer verticals of the mounts have been buzzed off.
Additional support applied to the part to bend. All this to make sure the only change happens right on the existing 20 degree bend in that "ear".
Voila!
This new section is also not quite as far out to the side at where it meets the frame member, which also helps create clearance for the exhaust manifold (which was cut loose from the cylinder head mount flange and re-angled outward somewhat to also get clearanced from this mount ear - more on the exhaust soon).
Before changing the mount nor the exhaust header:
Revised engine frame mount and exhaust header tipped outward to the header flange: