Which Power Rack&Pinion easiest/cheapest install?

In possible preparation of a 5.7 Hemi powerplant swap AND a slight bumpsteer improvement I'm trying to find out which type/year of Powersteering Rack&Pinion unit will be the easiest to install on my '73 Dart.

I'm fairly new to these type of steeringlinkages so I'm also looking for info which R&Ps have the best length/design/similar tierod-lengths for use in the Dart.

So, what have you used and what are your experiences?