My last notch had a 347 from D&D in it. Sold the car because it was burning alot of oil and I didn't have money at the time to fix everything wrong with it. The motor was only supposed to have 10,000 miles on it.
another thing to add is that I believe more than one D&D out there. One in Michigan, and one on the west coast. I've heard good things about the Michigan based D&D, but some mixed feedback on the other.