So far I haven't had that much experience with building GEN III Hemi engines. This Saturday I tested an 07 Charger with a 6.1 based 426 engine. The results were awesome. 485 at the wheels. I have decides to through my hat in the ring. I have already purchased two 6.1 cores, a 4.050 crank, and a set of 6.2 H-Beam rods. Also working on modifications to a set of 5.7 heads. From what I have found these engines are not that complicated. Looks like most of the cylinder head parts interchange with LS Chevrolet components. I will post pics as I make progress. I am also working on a custom intake manifold