I have several Buick V6 flex plates from different engines I have had over the years. For the life of me, I can't remember which engines they came off of. I had several Turbo engines and several non turbo. GM lists 2 different part numbers in the parts book; 25512348 for the non turbo and 25512350 for the turbo. So some of the flex plates have large rivets as weights and some do not. Which ones would be the ones specific for the turbocharged engine?