cam shaft selection

I put a Lunati Voodoo 256/262 cam in my 318 along with 302 heads and an iron 360 4-bbl. intake. However I'm still running stock single exhaust and basically 2-bbl. carb (ThermoQuad without secondaries) and the torque is just as strong down low, if not more than when it was all stock. Still pretty piggy though, those primaries flow less than 200 cfm. and my stock exhaust is pretty banged up.