429 smallblock Dyno warmup

The pushrod placement - as YR said.
For some reason they won't make a raised port head and intake to match. Even the offset push rod hole heads don't do those numbers until a full boogie cnc is done.
Raise the valve cover rail, raise the runner roofs, longer push rods,longer valves, longer head bolts, tall port intakes. Lq9 heads do better than most of what we have.