5.7 hemi in an A body

We did a 5.7 Hemi in a 68 Dart in 2008, then a 6.1 Hemi in a 71 Demon in 2009, both cars are still running great and lots of ways to install them have been perfected over the last decade...
Since there have been changes in the "hot rod" aftermarket why not detail a few of these changes?