ej20k

Hi. I got a EJ20g in my 1996 GC8. Ive heard that the 20K Heads are better flowing. I got a 20K engine from a parts car i had. If i went ahead and swapped over the 20K heads on my 20G, will the 20G Intake-manifold bolt on? And will i be able to use the 20G Wiring?