I'm looking for a bit of advice.  I just rebuilt a 440 big block for my ramcharger. I bored it .030 over, went with a mild RV cam, other than a high volume oil pump the engine is stock. I have been looking at the Edelbrock Thunder Series AVS Off-Road 650cfm carb.  I used a carb calculator, and the cfm recommended for this size engine @ 5000 rpm @ 85% was 637cfm.  Does anyone know if the 650cfm edelbrock will work, or will it be too small?