sleepers....how fast and how plain before it is one?

So if there is something that will catch my eye and not from a distant visual is a car that is extremely fast with Cast Iron heads these days..... Each brand had their own flavor but if you look around at the tracks everything just about has aluminum heads.... It's just something I pay attention to more after having my hands on a set of GM BBC Rectangular port heads (cast iron) that were CNC'd by Sonny's. Can't remember all the numbers but something in the low 360's on the intake side. That's a serious head and with the right combination and would easily be a single digit pass in a street car. That's just a components of what I call sleeper.....

The patina look makes no difference really.... If someone hears whoosh (lol) in an older car more than likely something is going to happen and run pretty good...

JW