I had originally considered an Atlas 6 before I bought the 250, but there seemed to be a bunch of support issues (oil pan, bellhousing pattern, flywheel, etc.) when I first looked into those. I've already got a T56 that wouldn't bolt up to an Atlas. There would be alot of money tied up in parts just to get it in the truck and mated to a manual transmission that I wouldn't have to spend if I stuck with the 250, or go with an LSx engine.
