The Eaton “roots style” supercharger we use is labeled an M90. It displaces 90 cubic inches (1.5 liters) and is rated to spin at a maximum rpm of 14,500. These are very durable superchargers and have a life expectancy way in excess of 100,000 miles. Most SC stock make between 11-13 lbs of boost. This can go up or down depending on most or used parts.
I don't know the pulley sizes, but the 5% and 10% are based off the 89-93 pullies as the 94-95 was about 2-3% larger.