How to Megasquirt your 3G Hemi

I haven’t read the entire thread yet, so maybe this has been mentioned. Has anyone tried the MS3 Gold box from EFI Source? It is a MS3 box for $800 and a plug and play Hemi harness for $495. To me it looks like you’d have the same setup with a plug and play harness!
MS3 Gold Box – EFI Source