Great!
It is a “doable” job by most members here – just not a “fun” job to do.
At least when the engine is installed, to help hold it up (the booster), somewhat.
Installing a brake booster without the engine I place can get real fun, at least until you get the first nut on a few threads.
For those who does not know, a Mopar with manual brakes (no brake booster), there is a rod that connects the brake petal direct to the master cylinder. So basically master cylinder rod travel is 1 to 1, after it leaves the brake petal.
A Mopar with power brakes, the rod going between the brake petal and brake booster (instead of master cylinder) goes through a series of linkage that increases rod travel 2 to 1. So pushing the brake petal down the same distance on both setups, the brake master cylinder moves twice as far, therefore stopping car with less brake petal movement and effort (power assisted).
On A and B-body cars,the manual brake master cylinder sits lower on firewall by about an inch. Also the brackets (firewall stiffeners) have holes drilled into them lower.
I haven’t seen any FMJ bodies to compare brake petal linkage and reinforcement brackets, yet. I do know adding the “Z” setup to manual brakes will make the brake petal too hard to push.
Item 28 is fixed. Item 31 connects to brake petal. Item 29 goes to brake booster.
Bottom hole is fixed. Blue is coming from brake petal and Red is going to brake booster.
The brake petals should be the same with or without power brakes.
They are different if manual or automatic transmission - but that is for a different topic