The basic logic is that the engine's a pump, and the drivetrain is a lever.
So, more you can pump (airflow and RPM), and the better your leverage (converter stall and gearing), the harder the car will run.
Obviously traction and weight are big factors, but you still have to create power and apply it efficiently.
W2s were worth a lot for me, and ported Batten (aluminum) W2s, an 850, a .630 roller, and 6,000 RPM stall were worth .80.
By then it was 368", and mid/low 10s.
Shifted it usually at 7500, occasionally 8000.