Brake fluid on firewall

The instructions included wont detail how to remove and reinstall the push rod. A factory service manual has that.
You'll probably need a new body gasket between master cylinder and firewall. That never comes with so... Order a reproduction from somewhere like DMT or find a piece of sheet foam packing material and cut to fit. In some cases the foot print of the MC casting doesn't quite or completely cover the hole in the firewall. Cut you body gasket oversize.
Wouldn't life be grand if everything needed was included?
They could atleast use a piece of this foam material for packaging the master cylinder.