Hi, I think you'll find that car has a LT1, aluminum heads- cast iron block. They didn't put the LS1 in a F-body until '98. Both came with a T56 six speed, but there is some differences between them, bellhousings and some other stuff. For a LS1, there is some minor reprograming to be done in the PCM when you switch from an auto to manual. Don't know if this is the case withy the LT1. Good luck with your project!