Just in case you need new master cylinder nuts, Richard Ehrenberg of Mopar Action fame carries them in his eBay store. Here's the listing for them:
http://www.ebay.com/itm/OEM-Mopar-D...ler-/321759741539?hash=item4aea600663&vxp=mtr I bought a set to use when I convert the master cylinder on my wagon and didn't want to mess around with old rusty odd size nuts.