[quote=?

Also who makes the best water jacketed Big Block Block now days? [/quote]
Aluminum or iron?
I have a new Koleno high nickel iron block and a new KB aluminum block, both are 4.500 bore sizes.
I will use the Koleno block for my next all out build (probably Pro Charged shooting for 4000 HP on either E85, straight Ethanol or Methanol with B1-MC heads) for my 1965 Dart top sportsman build