MegaSquirt will run just about any injector. Some peak and hold injectors will require a "peak and hold" box, and low resistance injectors may or may not require some jumper or resistors to ensure the injector driver doesn't short out, but that is dependent on which Megasquirt setup you have (MS3 Pro, MicroSquirt, MS3.0, MS2.2, etc).
Practically anything below 80lb/hr injectors are likely just plug and play with the MegaSquirt. I run cheap-o Accel injectors from Summit on my Skylark and Firebird. The Skylark has 44lb-hr injectors and the Firebird has left over 32 lb/hr injectors in it, which will probably need replacing when I put serious boost to it, but for now are way oversized for the application.
