Advice on manual style brake master cylinder on 70 Dart

To remove:
Leave the MC bolted in.
Remove the brake light switch.
Pull back on the brake pedal.
The brake rod is now out of the MC.

To install:
Install new rubber grommet into MC.
Use a soccet the same size as the grommet, and pop it in.
Bolt MC to firewall.
Bring brake pedal with brake rod still attached up, and pop it into grommet.
Reinstall/adjust the brake swich.
Done.