Certainly contact Mike for the updated details but there is a price list published (as a .PDF document) on his web site (www.sissellsautomotive.com). The price is is a bit dated (2004) but it will at least give you an idea about what products and services Mike offers and a general starting point for costs.
Also, my understanding is that Mike has two or three intake manifolds available for the 12-port head including one for supercharging (turbo or Paxton type), and one for normal carbs. I believe he now also offers individual port injectors (both mechanical like he uses on his twin six FED and electronic).
I'm not absolutely sure but I think he produces two versions of the head; one with water jackets and one that is solid (race only), though I may be wrong.
In any event, his 12-port head is a true thing of beauty.
