Worked on the heads all weekend, and no cracks! As many have mentioned, there sure is a huge improvement on the exhaust side of these, the intake side, not so much.
Dual quads. Even at idle my engine seems to like it better than any Holley or Demon. I running them 1 to 1 now, even got better yet. You don't need rpm, it idles great like Carters/Edel carbs and has kick butt power like a holley. I took the air door out of the front cars and lengthen the primary pump shot so fuel comes on out all the way to WOT. No bog with a 3,000 stall and 3.91 gears. I would never go back to one carb