I have a 2007 LQ4 that had a factory 4L80E behind it. I want to run a th350 and my question is I see everyone talking about the flexplate spacer and longer bolts if you want to run an older trans or the 4L80E. That being said I would assume I do not need them because they are already installed from the factory. I can not seem to find a cut and dry answer, the only thing I have found is if it is a 1999-2000 I do not need it but mine came out of a 2007 2500 van. Any help would be great.