KH question

Geez, people, windowed engine blocks get repaired, and used again, and who cares what method gets used in filling up those divots in those caliper halves.
At this point, who cares if you call it weld, braze, mig, tig, fig, big, or anything else.
To the op.
Get them filled up, or junk them.
Know you don't like to hear that, but if you had to do this all over again, from the start, you decision probably would be lots different with them, before you started spending all your money, on all the rebuild parts.
My .02 cents worth on the subject.