I scored a New Holley Dual plane intake and used MSD 6010 for $400. That's right. 4 Bills.. an Email tune alone would cost about that. EFI isn't for everyone especially if you have a properly tuned carb. If you score a complete running engine that is 100% complete by all means RUN EFI! I scored the 6.0 for a song. But the accessories, the sensors and the harness was trashed... The choice is yours.