1) Thanks. That is the specific question I am asking. Have you confirmed this?? My initial impression was yes, if swapping nothing else but a R200 based pumpkin into a R200 diff (in this case a Q45), it should be a direct swap
2) No. I am asking if you can swap a R200 pumpkin (ATS LSS or S15 HLSD pumpkin, R200 diff based off the S13, J30, Z32 NA diffs) into a 350Z, which is a R200 diff itself (although has a different pinion and ring gear design). Base R200 (S chassis, R chassis, Z chassis, J chaasis, etc) internals are NOT swappable to a 350Z carrier. The internal/external dimensions prevent this
3) Why would I go plunk the money and time to pull all those diffs for it to not work?? Sometimes you need to work smarter not harder
. Time spent pulling diffs in junkyard is not spent making $$$ doing other things