iam planning to convert in to an evo under the hood so i could have somethng rare. from the outside looking like a normal standard gsr but from the inside evo engine.

Im gettn a deal on a evo 2 block and gearbox, evo 5 head ,conversion kit and this guy i know selling me a evo 4 ecu .

so i kinda got evrythng mixed up but will awl of it fit together in my car ? i got labour cost sorted so thats one thing outa the way.
will i need to change my intake manifoild ? cos it dsnt come wit the engine ?
and anythng else i need ?

HELP PLEASE

THANKS