Been plagued with lean mixtures of 16:1 - 18:1 (fluctuating like crazy) after putting my motor together. Tonight actually got to burn a chip in which I increased the Injector Pulse Width vs. LV8 by 1.10%, which gave me a 15.7:1 (steady) mixture. Second chip adjustment was by 1.20% and the A/F mixture came down to 12:1. I think I'm getting close. This is at idle; I'm sure that I will be going crazy trying to nail the entire RPM range. :D