Master cylinder reinforcing plate

I don't know about a reinforcing plate, but I do know that you need to have an adapter plate if you want to run the later style master cyl. That's what I plan on doing when I convert to disc brakes later this year.

Here's is one on ebay from Summit Racing...

http://cgi.ebay.com/ebaymotors/Mopa...011QQitemZ320143186224QQrdZ1QQsspagenameZWD1V