Old vs New 360/5.9

I've played with 318, 340 and 360 in the past and much has changed since. Can anyone turn me on to a site or book that deals with interchanging parts with the newer Magnum motors?
Will the faithful 727 bolt up to a 1998 block? Can I bolt the new style 5.9 Magnum heads to an older block? These are the kinds of questions I need help with.

I ask because my Son in Law heard that I use to race 67-72 Darts and now wants to get into it.
Any direction would be greatly appreciated!