yes i made a thread the otherday me an 2 mates did drop the motor in with the box attached, it was fairly easy took us bout 1.5 hours to get it bolted in,
but my wheel ect.. were still bolted back on so i didnt have use jack stands or else my engine crane would go high enough, i also had to jack the ass of it up to tilt the front down to get it a little lower and a better angle
EDIT just read you wanna take it out just do the reverse
i did it in a r33 gtr but used a forklift