Here I have another brake master cylinder cover identification need. This one has the ESA-M6C25-A Ford specification, which should rule out Mopars, and would be Ford/Mercury/Lincoln after 1967. However, the Bendix 2230647 gasket does cross over to Mopar applications.
The cap is larger than what we see on the Mustang; it is 6" long by 3.25" wide.
Any help identifying the use would be appreciated! John