Slant 6 doesn’t go back in

Octavio Garcia said

... now my issue is my brake booster. Is there a plate between the master cylinder and the brake booster?

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I vaguely remember a thick aluminum plate on one of my Mopars. It had a slot at the bottom to drain any brake fluid that leaks past the MC piston. It must have been on my 1965 C-body or a 1974 Dart junkyard booster setup I had, since the only boosters I had. My 3 old Mopars now have different brake setups, all with newer aluminum 2-hole MC's.

In my newer cars (1984 M-B, 1996 minivan), the boosters use a vacuum seal between their body and the MC, to allow a thinner pancake booster, so they don't need a drain hole. If the MC piston leaks past, the fluid gets sucked into the booster to cause other issues.