Sorry to say but the gearbox photos wont be of any use the car is a FWD.
I know that my 120A Cherry E10 (1975) came with the F4AW60L or F4WF60A gear box but i wouldnt have a clue as to how to tell them apart. For most of your questions you would be better of posting them on the Datsun owner of Uk web site.
Thats were I get most of my information for my cars from.
have a look at this post from on there.
http://www.datman.co.uk/phpBB2/viewtopic.php?t=1233&highlight=or go to here for the info on where Eddie (ratdat) has done the conversion before.
http://www.ratdat.com/ its in the technical area.