yea just drill and tap. theres blanks for the oil return/feed/water where it would of been drilled by the factory if it was a turbo. this link will pretty much giv u a good idea. but of course its a S13 SR.
http://www.initialdrift.com.au/forum...php?f=8&t=3393
MCcoy can u giv me a more detailed description on how u did it plus the wiring? i got a DE im bout 2 run NA untill i save up money for a t28. i would greatly appreciate it.
hope this help u out some, flip