anderstein

Alright I am not 100% sure we're the rubber gasket goes. It it in-between the master cylinder and the booster? Also do I put grease on the master cylinder piston? Can I install the master cylinder in the booster before installing this?

honerboys

i don't think you can get the booster in (or out) with the MC attached - if i recall i had to remove the MC then step on brake pedal and clip a vice grip to rod to trap it when it protrudes out on engine side so booster could be shoe horned in and out

Mrmerlin

make sure to make a protective plate to protect the mating surface of the MC , while using the vice grips.
I use a piece of coolant bottle with 3 holes in it .

NOTE that black O ring goes on the MC to booster interface,
use DC111 on the O ring and the MC inlets prior to grommet insertion this will keep water out of the metal