cucvrus
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I have installed over 100 flex-plates on CUCV's. New used and questionable. I never set one down and checked if it was flat. I looked at the teeth and made sure I seen no stress cracks in the steel inner surface. The unevenness will go away once it is secured in place by the 6 crank shaft bolts and the 6 torque converter bolts. I think you are getting flex plate paranoia. Just put it in and correctly fasten it to the correct torque converter and it will be golden. I know the frustration you are having doing this job more than once. I have been there on many projects. Mostly fixing other peoples hacked up modified junk. At this point in life I choose which projects I want to involve myself in and which I will pay to have done. I don't even change my own oil anymore because I can hardly justify the $47. that the GM dealer charges to do it. I trust them because they basically let me in the shop while my truck is up in the air and I check everything. I took my M1009 to the GM dealer for PA state inspection and service. It never needed anything because I was strict on maintaining it. If it had a strange noise or issue. I was on it. I sold that M1009 3 years ago and I still see it from time to time. You are doing a great job. The only thing I would do differently is have the transmission gone over before putting it back in. Good Luck and Happy Holidays.