The carb kept the AFR curve mostly the same over the runs.
3000rpm being max. torque area. This might mean something.

I did change the IMPCO propane carbs since last year I remember.
But looking the Dyno-charts from last year's runs, I'm seeing the same rich 'dip' in the AFR curves.

Been thinking if I want to install the old exhaust pipes to the current header collectors or not.

I'm currently uploading a video showing all the dyno-runs and dyno-charts.
Will post the link when it's online.