200-4R Transmission

Looking for a list of parts to replace during my rebuild of my 200-4R Transmission. Going behind a 350-400hp motor in a 64 El Camino. What rebuild kit is best? Any Additional items I need? Have heard the CK Performance makes a good rebuild kit. Do I need to upgrade to a 10 vane pump? ETC

Thanks

Might want to check in here: Art Carr 2004R Performance Transmission, Racing Shifters and Torque Converters This is the 2004R Guru.