Confused of Ashford
Thanks for all your advice everyone. But, I'm officially confused now! Mods - this may need moving to it's own thread!
I was looking at the photo Rob posted and did a bit of googling. I found
this page which shows that same image and some others (I have downloaded them and used some below. If you click on the pics on their page I linked to it pops up adverts and other mess).
My diff is a 3.7:1 ratio so (assuming the table on that page is correct) I must have a 280ZX (2+2) one.
If I've understood you correctly, then the moustache bar needs to be rotated and the front mount left the same. The picture below is my diff before I rotated the rubber mount at the front:
I checked the moustache bar on the car (it was fitted when I bought it) and it's flat along the rear edge and the rolled ends are forward. I think you are suggesting this is wrong when the R200 diff is put in a 240Z and that the rolled ends should face rearward so it brings the bar (and hence the diff) forward.
I have done the opposite - I rotated the rubber mounting on the front bar 180 degrees which meant the diff mounted against the moustache bar fine. Now the front bar is further forward it means the prop shaft is tricky to bolt on.
The thing is, looking at the photos in the page I linked to, it looks the same as my setup.
i.e. the front bar sits almost proud of the input shaft:
Also, the moustache bar ends curl forward (see the lower R200 diff below):
Something that bugs me though - I don't remember my diff being offset and it's very obvious in the photo below (left):
Is there an alternative diff that comes with a 3.7 ratio? Or is there a chance the internals have been swapped in mine?
Also, in the page I linked to the author says not to use the R180 drive shafts because of the different lengths. I noticed that the passenger side shaft appeared a bit too long and I needed to disconnect it at the hub end to make it fit (Rob said the same). Should I be concerned?
Sorry if I've missed the point here, or made any else even more confused than me!