Its funny thing that ignition is much easier to get than fuel injection.
Fuel got much more variables.
You can drive with carb and tune the spark map and then get the fuel stuff.
You can do fuel first, but fuel map changes much more if you tune spark map, so spark first is a little bit easier, I think.
My fuel effiency was same with my TBI and old carb version, but I think a worn out engine was biggest problem then.
Power gain in lower RPM's was high and it was little bit hard drive with low stall Cruise-O-matic.
Stall was good in about 300-350 RPM.
New setup with motorcycle throttle bodies and dizzyless ignition got too few miles (about 1/2) so I cannot say much about it, all can I say that fuel effiency is not good as it used to be if lopey idle tells me something(new cam with hard grind may have something with that)
Crane XR-1 is good to trigger pick up and Crane HI-6 or Bosch 139 is good to amplify the spark.
Just lock your dizzy to 60 degree and turn your rotor to point about 25 degree so MS can start to calculate ignition timing from 60 and wide rotor can deliver spark from 0 to 55 degree.
I hope somebody understands this cause something went wrong with my english studies way back, since 3rd grade.

Hyvinkää, FI