Intake and carb were installed new and have less than 200 miles on them. Engine has 40,000 and has never had the heads off, so I don't believe anything has been milled. I used to sell auto parts for years and yes, I have seen many parts all fudged up right from the box. I am pulling the TM-7 and 600 cfm Edelbrock carb and bolting on a new Performer RPM and 750 Holley this weekend. I will re-use the valley pan and use FelPro MS 90175 paper gaskets. Should take care of the problem.