... just buy a plazmaman or hyper tune. I know it looks like it's the more expensive option, but it won't be.
Oil cooler relo normally takes up more room then stock set up especially above the mounting block (where you will need the room for rb26 IAC).
As for the picture above, if I took that picture to my fabricator.... $600-800 at minimum just in time and flange. That's plus buying the lower half manifold, tb's, probably a rebuild on the tb's, plenum, throttle brackets, adapting the r34 tb, linkages, joining manifold, ballance manifold (that may well foul on your neo designed fuel rail), IAC block, IAC motor, hose work etc...
Then you have to make up a new throttle cable, depending how long you make the runners you will foul on the VCT solinoid.
New intake/cooler pipe work, BOV mounts etc
List goes on.