Too much gear?

4mulas said

What were the atmosperic conditions on each day. That could affect the performance.
But maybe the 4.56 is a bit steep too, imo.

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It's only trapping 6,000 even with that Godzilla cam in it. He may need more gear, not less. It relaly needs to be run on a dyno to know where it's running out of wind.

What carb is on it? Maybe those heads are the issue. Something isn't adding up with that that timeslip.