You make no mention of ignition. What are you running? What's the timing curve? Also, was the camshaft degreed? That combo kinda screams off idle grunt. It should be a tire melter.
I'm currently running stock ignition, a regular distributor with a blue ignition module. I did put some medium springs on the weights. The ballast resistor is bypassed. I didn't degree the cam, just lined up the dots and sent it.