Typically, a 4-link is better for drag racing, although some triangulated 4 links work well on the street. The 3-link works well too. The 2005+ Mustang uses a 3-link with a panhard bar and they handle great for a live axle car. Still, I'm not so sure you need to swap out the rear suspension for something custom, unless you want to. The guys at Hotchkis have a great suspension package for your E-Body Mopar. Check out the link below and watch the video at the end of the Blog article.

Front end choices are alterkation, magnum force and capautoparts.com. The capautoparts doesn't have mounts for the new gen hemi, but magnum force makes an engine mount swap kit that should work, even in the capsautoparts and alterkation K members.

Rear end choices, none. No bolt on that I know of.

There are a few options though. There is a good tech articile at hotrod that shows how to install independent suspension on a muscle car.

http://www.hotrod.com/howto/hrdp_0712_irs_for_musclecars/pictures.html

Also, check out the following link on the 200 mph super Cuda.

http://jalopnik.com/5426259/twin+turbo-super-cuda-races-enzo-hits-208-mph

And, I know of a few people installing Viper rear end setup in their muscle cars for all out street cornering...

Good luck!