Does it act like it wants to start at least? Sort of cranks but just won't turn over.... If so.. make sure you didn't flip flop your fuel lines... I did and it took me a lil bit to figure out why the sucker wouldn't turn over.
The engine itself isn't any different than the GDA's here as far as I know. Definitely check the timing though. Which ECU are you using?
Did the v6 have AVCS? If so... and if you're not using an STi ecu.. unplug it!