Works very well with carbs
The only difference in the hookup is that you don't have to worry about the signal to the EFI.
In other words, there's less to hook up.
As RacerX has pointed out, the MegaSquirt will not be able to control the Ignition's advance, mainly
because there's (currently) no interface between the crank position sensor and the coil pack driver.
(I'm talking about using MegaSquirt with the Allison's Ignition system) Not a concern for me.
However, the MegaSquirt CAN be used to control the injectors with this system.
The racers out there might think they're loosing half the control the MegaSquirt offers, and they might be right. :sad:
But if you're looking for an easy to install ignition improvement with your current system, this is one to consider.
I love mine.