I am building my ka and want to turbo it but i want to do it right i want to run high boost im using a jwt cam, injectors, and ecu i know i need forged pistons and rods but do the valves and the crank need to be forged????????????????? and if so where the hell do i find them?? ive done alot of swaps and engine work but this is my first na to turbo build.

How much power do you plan on making? If I'm correct KAs can push around 400 on stock internals (I wouldn't suggest doing that).