http://www.bigblockmopar.com/ The web address says it all.
http://scootermcrad.blogspot.com/ PhotoArts and entertainment and one of the finest hot-rod projects you will find.
http://wildcatmopars.com/ My good friend Ed has 10 acres of pre-1980 cars and trucks. He has what you need.
http://www.jalopyjournal.com/ A meeting place for traditionally inspired hot-rods with sometimes spirited conversation and excellent tech articles.
http://www.rustyhope.com/ Disc brake conversion kits for Mopars.
http://www.aajbrakes.com/ A second place to look for disc brakes kits.
http://foxinjection.com/index.html Fox Engineering, for intake systems like no others.