hello, I have turbotweak5.7 chip 94 octane 17-18pounds of boost.....On the BLM's on the scantool -/+ 128 which is the best number. With in 10. Is it better lean or rich. I'm thinking lean, mine blm's are 137 on the scanmaster, fuel pressure around 42-43 psi vacuum line off. What do u guys...