I see you're new to the forum. It's great to have you here!
There is some really great information here. If you use the search option you can get a lot of questions answered.
Don't ever hesitate to ask questions, though. There are some really great guys and gals here that are always more than willing to help you out. Slant6Dan is one of them. He knows more about this Slant 6 stuff than a lot of people.
There are several other websites that have great tech articles on them as well when it comes to general Mopar stuff. There are two that I know of that are set up just for A bodies like your Dart. Big Block Dart.com and For A Bodies Only. Others like Moparts, Mopars.com, Mopar Action and Mopar Muscle (magazines), Mopar Webring,...
For Slant 6 specific stuff you are definitely in the right place!
Probably the best way to get familiar and involved with this Mopar stuff is to find a local Mopar Car Club or any local Car Club. You'll meet people, get ideas and really get involved. The internet is a great source of information, but there is nothing like real "hands-on" experience.
Have you introduced yourself to the board in the Social Corner section? I should have looked first I guess
It's good to have you here and welcome to the "Slanted Family"
Rob