RE-read my post above. Is this a different distributor? Try reversing the pickup wires. Google "rotor phasing." You can do this with alligator clips temporarily
CHECK THE RELUCTOR is installed correctly!!!!!!!!!!!!!!!!!!
These are used in both big block B/RB (ccw) and SB (cw) rotation. You should have the correct rotational arrow next to your retainer pin in the reluctor slot
See the CCW arrow next to the roll pin on the right side of the photo? This is for a B/RB engine, a SB you need the OTHER pin slot