Mild 318 misses at 3000rpm



Mild 74 cast date 318 build
30 over, kieth black hyperT pistons, Mopar P4452757 cam, stock heads ported/blended with 1.88/1.6 valve job, performer intake, Holley Street Avenger 600, Pertronix flamethrower HEI module and coil, stock remanufactured electronic ignition distributor. Everything is new. Had a an intake manifold leak I fixed. Initial timing is 20* total is 32* timing is steady when the miss happens.
Could be the pickup in the dizzy???
And ideas?
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