Well how much power can the t5z hold? I want to make sure I'm not gonna be kicking myself later on. I'm planning on building a 400 hp motor at least. It's a year long project, but I figure since the tranny went ahead and took a dump I might as well get what I need in there now. I was hoping this wouldnt' have happened so soon, I had planned to take a transmissions class at the community college here next spring. I need to take it since I see a transmission as something that puts power to the ground and thats about it.