All your questions have been covered hundreds of times. I hate to be the one to say it but the search button is a powerful tool in gathering just about any information you want about fourwheeling either here or on Pirate4x4.com's bulletin board. The SAS is probably the most common topic so there is tons of info on the topic. If you don't want to search just look at Marlin's products. They offer the best parts for almost any Toyota application. For driveshafts, I know many people who swear by High Angle Driveline. Good luck on the build.
