Hemi oil pan on 440?

The normal 440source pan or the 440source hemi pan? What allows them to work that won't let a stock pan work?

these ones. now i will say this, on our hemi's we are using the correct race hemi mounts and spacers under the k frame(not that the spacers change the pan to centerlink clearance). but on all our cars they clear just fine.

http://store.440source.com/Oil-Pan-Center-DEEP-7-Sump-Plain-Steel-New/productinfo/121-1003/