Master cylinder question? What's it fit?

Boy, didn't know when i thought i was asking a simple question in regards to identifying a master cylinder, i was going to get into an internet pissing contest over it.
Figured someone out there in Mopar land would recognize the number from something that they have.
But every so often i seem to get into a pissing match with somebody on the other end of the internet.
Just a damp dark, rainy night around here, that i couldn't do my evening mile walk around my neighborhood.