I'm looking to buy a new 18 degree small block chevy short block. Anybody have any suggestions on where the best place to buy one is? I have a set of 18 degree GM heads that flow approx. 394. I'm building it for nitrous so I need a good block (Dart, or Motown), good H beam rods, nitrous pistons, hellfire rings, good bearings, billet main caps, and so on. You get the drift, any help would be appreciated.