If you stay under 20 psi, the rib belts system will work - if you keep it tight. With a 4" pulley, I can make 15 lbs of boost @ 5K and over. 3.7" blower pulley can get you over 20 lbs, but belt tension and slippage becomes an issue. I run a much bigger carb than the OP. Simply because my 950 Prosystems carb was on my NA motor and when I went blown, I just sent it back to them for blow through Mods. Came back with very large annular boosters, so I'm sure it doesn't flow 950 CFM anymore.