I have a tough to find B210 booster for sale. I ran it on my car last year with zx brakes up front and stock rear drums and it did a great job with a 7/8" MC. I decided to go a different route once I had 4 pot calipers up front.
I will include the vacuum line with check valve set up for a KA. A simple trim of the hose could make this works with an L motor.
The booster came from Cali so it has no cancer.
I am asking $180.
Buyer pays shipping.