Base tune for 5.7 on MS3X

I did not post a tune file, as I have not run a bone stock motor, and I don't want to mislead someone with one of my Hilborn tunes. I would recommend just building one. It shouldn't take more than 30 minutes.

Alternatively, you migh be able to convince someone with an EFIsource tune to help. I believe those come with a 'base' 6.1 tune.