i used a DP4B intake, 850 Thermo-Quad, SSH-25 cam on an otherwise stock 383.
2500 converter and 3.91's in my charger.
that combo worked pretty good for what it was.
best et was 13.56 [i can't remember the mph] but usually ran 13.79-13.90, without getting into the distributor to get a good curve.