rspeed9i6

sup guys..if any1 can help it would be appreciated...im planning to upgrade my fuel system, since my injectors and possibly my pump are takin a dump on me...anyways, im planning on a rp fuel pump, and rp 720cc injectors. now i went to mazdatrix and their are lots of "injector parts" that i might need wen i replace them...any1 know of wut i should have in hand b4 i change my injectors?...also..is it necessary that i get a fuel pressure regulator and a piggyback ecu (s-afc) of sum sort?...thx...pls let me know asap...randy

ps.. its a 87 tII by the way