Keeping It Simple...with a Hemi.

For the most part any pre-09 engine can be made simple. The parts all swap pretty freely. For instance, my 06 5.7 from a 2006 Charger had MDS when I bought it, but you can buy the plugs to disable it and new lifters. The same plugs and lifters are found in the engines without MDS stock, so it's all the same parts. 09 introduced VVT and I think even variable length intake at some point.