As the driving season is coming to a close for me, I'm starting to think about winter projects. It's becoming clear to me my trans is in serious need of some TLC. I have a spare trans lying around which I'm considering rebuilding myself. My questions to the Buick masters out there is is this something I can do myself? I have no problem tearing an engine apart but I've never done any work on a trans outside of a filter and fluid change. I know there are some specialty tools that will be required. Question two is I plan on rebuilding the engine also, but maybe not this winter. But when I do, it won't be a stock 455 rebuild. I would like to get it into the 500 hp/torque range. So what mods to the trans do I do to be ready for that? Or is that getting into a territory where it would be better for a pro to do it?