Trying to figure out which 340 electronic ignition to get

The Revenator and the FBO boxes have both come back with excellent reviews. Ether one is use over the Chrysler Chrome box which has been my favorite for decades.

If your going to move away from the stock style set up, without a doubt, I’d use a ready to run distributor. While MSD has one (pricey bastards), I would go over to Pace Performance and use there ready to run unit at a much reduced cost. They are built by the same people that build the MSD units.
Speak with Johnny Mac here. He used to work there but is now at Blue Peint Engines.
I use one now and love it. It performs excellent. EZ hook up and go!

I would not ever go back to a 6AL.
Screw that garbage!
What a waste of time and money.