i have around 14-15 im mine. that was doing my own machine work and building it myself. prices have came down on some of the stuff since i did mine, but if you have somebody build you one i'd say your still gonna be around 20 or so.
I see some Ray Barton bashing. i have a buddy that has a barton hemi in a street strip car. its been a real good motor for him.
i'd recommend either Barton or Modern Cylinder head for at least the heads. Bartons valve gear is also real nice...