Mild 318 misses at 3000rpm

Filled the car up with premium gas, set initial timing back 15* and drove around for the first time.
She hesitated some here and there but when rpms claimed over 2000 I think some of that advance came in and then it ran real nice. Pulled like crazy up there.

Both fuel mixture screws on the holley are 2-1/2 turns out.

What next?
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