I am building a series 5 FC out of a wrecked car and a good shell I also have a series 4 that has some good parts on it. this is a list of what I want to use on the S5

USE:
4 piston calipers from S4, will I need to swap the MC as well?
lsd from the S4
manual steering rack from the S4

not sure:
rear calipers off the S4
S5 or S4 front control arms
S5 or S4 trailing arms

If anyone knows what is best from experience I would like your feedback. I am new to the RX7 and hope to have a good experience with it.