I'm looking at buying a new carb what should I get. curently I have an edlbrook 625 cfm on a built 350 10-1 compression something like that(HEI ign, flat top pistons, RV cam, larger valves, holly intake, headers no cats) I recently rebuilt it but still rough. I was thinking about a road demon carb 625CFM but not sure about their off road worthyness.