MegaSquirt (MS3) or Holley HP EFI

I run the MS3PRO Evo on my turbo’d 5.9 Magnum. I love all of the features that are included ootb and use many of them. I will say that when I go to the track most folks run the Holley and there are plenty of tuners that know it. That said, Megasquirt has a very active and helpful community.