Alright, as far as changing the fuel map is there a reasonable percent I should change it all the way across with 390cc injectors with roughly 8 psi of boost compared to the stock PM6 settings?

I know it won't be perfect with that but at least the car will be running without leaning out or anything.

 

you can't really simply adjust the entire map. You can adjust certain areas until you can drive it, but that still isn't very good. Just spend the time/money to tune it.