some msd/o2 sensor experience needed

You may already know this but 11.7 to 11.8 is pretty rich if it's straight gasoline (no ethanol). You'll probably make more power if you lean it out some. Plus it won't load up the plugs so bad
"More power!" ? Yikes ! On the test drive i came around a corner to a long open straight in second and at three grade pushed the loud pedal down about halfway - well it went sideways for a half block as my gal was screaming -YYEEEEE HHAAAAAAA!!!! Until I get a little more use to this stroker motor I'll probably only notice more power on my time slip at the track. I'm sure you're correct . I think my first step is to identify the metering rods & jets to know how to proceed ?