I would sell the GM and make yourself a ton of money. I put AMD on my wifes car and the door to fender gaps were HUGE. I had to add metal to door to get gaps correct. I called AMD (been over a year ago), spoke with one of the owners and informed them of the gap issue along with pics of GM fender vs their fender. I was told the issue was the inner structure of fender was incorrectly installed not allowing the outer portion of fender to get the gaps right. The owner said he would investigate production line to check QA. I dont know if this is still an issue or not.
The AMD metal is thicker than other brands. I used their qtrs and door skins as was very happy with the panels. Hopefully the fender issues have been corrected.
Either way, you will have to do some metal work with GM or aftermarket.
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Jay
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