Decided to cut off the "nubs" around the bolt holes, removed and discarded the rubber "gasket", sanded and painted the aluminum " feet". Later down masking tape for reference lines when eyeballing the final resting place for this roof rack. Marked and drilled the holes, luckily almost perfect alignment with interior.
Now for the test fitting. The original feet had a different cube then my truck. Position rack, Test fit, remove, pound with 5lb min sledg, test fitt, repeat until each foot fitt "good". Maybe 5-10 test per foot/corner.