[DRJDVM's '69]

Here are some links...

Good general websites..
http://board.moparts.org/ubbthreads/ubbthreads.php
http://www.bigblockdart.com/techpages/techindex.shtml
http://www.lxforums.com/board/index.php
http://www.modernhemi.com/forums/index.php?

Suspension
https://www.reillymotorsports.com/
http://www.xvmotorsports.com/about/index.cfm
http://www.firmfeel.com/
I'd avoid Magnumforce......

Engine
http://www.shophemi.com/
http://purehorsepowerperformance.com/hemiparts.aspx
http://www.indyheads.com/
http://www.modernmuscle.biz/

Transmission
QuickTime makes bellhousing for T56 and TKO to modern HEMI
Hurst Driveline (formerly Classic 5 Speed) offers trans kits

Radiators
http://www.wizardcooling.com/
Ron Davis etc etc

Electronics
FAST makes computers and harness etc for conversion
Mopar Performance makes an ECU now too

Headers
http://www.ttiexhaust.com/
Hedman, BBK etc make shorties too

General Restoration and Conversion stuff....brackets, accessories etc etc
http://www.bouchillonperformance.com/
http://www.hotrodlane.cc/
http://www.rtspecialties.net/
http://www.tonysparts.com/
http://www.beaparts.com/online_catalog.aspx
http://www.weldtechstainless.com/wtstainless.htm


That should get you started