so ive got the build in mind, its going to be a ka24de. ima do the turbo and all. but im wondering do i have to upgrade my crankshaft? i heard its a halfshaft or something like that. What does that mean even? but eagle rods, arp rod studs, cp pistons, rings & stuff included. but do i need bearings? and does anyone know anywhere... in alabama.... that can do head work?