We used a Sawzall to cut through the plaster and wood lath at the junction of wall and ceiling.
Fortunately, the brick was soft enough that the bit tended to emerge cleanly on the outside.
We secured the inboard ends of the rods to Simpson HDU2 hold-downs attached to the ends of the joists.
Where the rods emerged from the brick outside, we applied sealant, then capped them with 6-inch-by-6-inch-by-3/8-inch galvanized plates fabricated by a local metal shop.
