[Hotfingrs]

I've had several engines built with the 400 sbc, all in the 600hp plus range, and have never had a problem with head caskets. Of course the heads did have the steam holes in them. The current engine that I am using also has the heads drilled between the middle cylinders by the plugs, and the water pump is also drilled on each side and a braided line runs from the pump to the heads. The intake manifold also has front to rear cooling lines.

These engines see weekly trips to the drag strip and the "occasional" friday or saturday night blast down the highway of life......