Brake Booster, Firewall, grommet

[RussTalbot22]

I am finally ready to reinstall my brake booster on my 1972 F-350, after being down for 3 years. I have forgot what fills the hole in the firewall. What covers the hole? The rubber boot from the booster, barely reaches the firewall and is not large enough anyway.

[jimmy828]

On my 69 there was a plastic boot that slid over the rubber boot . It looked like the rubber boot kelp the plastic one pushed up against the firewall. I did not have power brakes but was lucky to find a used booster that had that piece on it. I took it off and used it on my new booster.

[ultraranger]

The black plastic boot that goes between the booster and the firewall will look like the one in this photo.