You're going to have to give us some more info dude. Which transmission are you using first of all?
A simple search using terms like "sc400 manual" "sc400 5 speed" "sc400 spd" "sc400 w58" or "sc400 r154" will get you lots of results and help. Also look through the DYI/Tutorial thread stickied to the top of the sc300/400 forum as well, I know there's a few links to threads that already list EXACTLY what you need to do this.
Here's one of the original threads that got everyone into swapping manuals into 400's. Although I think QuantumAuto is now out of business (not sure, you'll have to look in to that), but I think a lot of guys use 1uzfeswapkit.com for their swap kits.