Redtop 3sge

Quick question about the redtop beams 3sge from others who have/work on them, I've been looking around for a service manual but my Japanese isn't very good and I hate tryna read Kanji, I've been looking and keep seeing everywhere that its a 3rd gen 3sgte bottom end with a 4th gen (redtop beams) head, im just wondering how much of the motor is 3sgte (i have a service manual for it) and what i need to find for the beams stuff, any tips for finding info or parts would be much appreciated