Rear Wheel Tub adjusting outer side of tub any sugestions?

you say , well known mopar drag racer says diff.
This
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not this
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If it looks good, interior panels and set fit, and isn’t some kind of high value vehicle a mini tub isn’t a bad thing at all. Maybe the drag racer was thinking about a full tub job. Drag racers don’t usually restrict themselves to mini tubs and go whole hog.