I have an issue with trans to flex plate
That is interesting. Confirm this is an LA based engine and not a Magnum based engine?
How much clearance in "inches" (sorry about my ignorance of the metric system, I have to use a conversion app) do you have between the torque converter when it's unbolted from the flexplate and pushed all the way into the transmission as far as it can go, and then pulled forward to the flex plate all the way?
Is there any run-out at the flexplate or torque converter ring gear when rotated? Do you see any cracks in the flexplate near any mounting holes etc?
Can you post some pictures of the wear on the ring gear and starter drive gear? How much play is there at the crank when measuring the thrust movement ( use a pry bar to push the harmonic balancer forward and aft)?