Yes, you can shim the top of the fender where it bolts in at the top. Above/behind the hinge at the bottom of the A pillar. This will affect how the door lines up with the fender. It will move the fender out, if it's too far you can move the top door hinge out as well.
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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