Civic EG

B18c swap

Okay, so here we go...
i have my engine
waiting on my gear box and shafts...

This is the drama-

do i need new wiring for behind my dash to accomodate for the new engine ?

or just the wire from the engine to the Ecu???




im so confused, my friend told me that i would need the entire inside Re wired



i really need this all clarifed

so, if possible, could i get a list of exactly what i need please?

i have a EG4 d15b2 civic
the engine ive got is a b18c4 (form a civic aerodeck, similar to the b18c1, has p72 a0 pistons etc)

please help me !!