Putting bigger box in brick mailbox?

[Stimpy]

I have a classic, brick mailbox with a standard T1 box built in the early 90s. I'd like to get one that's closer to 1'x1'. I have two questions:
1: what's the construction inside the box? Will I only have to modify the front veneer of brick, or is there more brick on the inside?
2: What are means and methods for making the hole larger? Score a line and chip away?

 

[Sparky617]

No idea how it was built. I'd use a angle grinder with a masonry disk to score the outline of the new box in the face of the brick. Go as deep as you can. Then I'd use a cold chisel to open up the space behind the face brick. You do run the risk of breaking it though. Drilling holes with a hammer drill in deeper will make it easier to break out the bricks.

 

[Stimpy]

From watching youtube videos on how to build these things, it looks like there's two options. Below the mailbox is a CMU core with brick veneer, then around and above the mail box is either solid brick/mortar or a styrofoam mold with a brick veneer. I guess I'll just have to find out.