Pitching "Lean Burn" into the trash

Sounds like a nice car well worth fixing up.
I'm going to pitch the lean burn on my '81 Dodge p/u. I found a good article on this conversion at slantsix.org. It has a good detailed write up with electrical diagrams.
Does anyone know what to expect from the conversion in drivability, performance etc. from doing this mod alone? All the vehicles i've driven with lean burn were dogs and gutless.
Is that specifically why you are getting rid of the lean burn?