hrmm. ok. well when i put the rb26 in my dr30 the only thing i had issues with was engine mounts. a local xmember is better or a non turbo one. as the mounts are paralel.
i basicly uses the factory rb engine mounts. i had to make a custom gearbox xmember. and tailshaft. (rb25 box)
ive stiill got the shaft kiking around. the selector lined up fine.
wiring wasnt an issue. (aftermarket ecu)
the driveline angle wasnt perfect but. (couldnt get the box high enough and the engine low enough) so slight vibration was felt