Should be covered in here http://www.symatix.co.uk/300zx/EngineRemoval/EngineRemoval.htm and here http://300zx-twinturbo.com/cgi-bin/manual.cgi good luck!
hehe.. nasty job done it a few times tt or NA? tt need to remove passenger dump to reach top bolts.. this talk of giant extension and stuff is shite.. remove passenger dump and you can get up there with a ring spanner tail shaft comes off with bolts onto the diff and 2 bolts in center bearing.. just slides out of gear box
I liked using the long extension when taking mine out, just need to unbolt the rear crossmember/mount so that the gearbox tips back and you can get the extension with socket on the bolts each to their own