71 Duster Dyno

mopowers said

I wouldn't make another pass until you get the front end figured out. Did you have car aligned?

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Agreed.

You have something wrong with the car from a front/rear wheel alignment, bad front end alignment setting (toe out) or something. That's dangerous.

Radials on back, bias up front or vice versa. Something isn't liking what's going on. A sway bar isn't going to help that issue.