where is the brake booster of focus?
drivers side on the firewall, I think
What is the break booster and what exactly does it do????
The break booster is a large vacum diaphram that assists in breaking. What it does is pulls the break fluid from the calipers and wheel cylinders when you release the breaks. It allows for a quick release of the breaks when you remove your foot from the peddal. Whitout it your breaks would hang and and keep contact between the pads and rotors and shoes and drums.
How stuff works, Power brake Boosters
Might want to be very careful with that seafoam... I've read about Bad Things happening while using it.