does any one know if 120y diffs fit into 1200 coupes? cheers.

yes they do. I have one in my 1200 ute. I think you have to weld up some brackets for the handbrake, and posiibly some new mounts onto the diff ( I didn't do the conversion myself)

The track width is increased by 20mm or something with this diff, but if you have 120y or stanza struts, it'll be about right.

I take it by your username that you have a CA18det. if its mild, you can use a 1200 ute diff. apparently they can handle (mild only) ca's. If its worked, the 120y diff won't hold on a lot longer, but i think they are slightly stronger.

If the 120y diff is an H150 (where the centre unbolts out the front), the centre can be bolted into your 1200 coupe housing with maybe (or maybe not) a spacer of 2mm.

This will be stronger the the original 1200 diff but not as strong as the 1200 ute diff.

what HP are you wanting, this will determine what diff you need.
Heath

well people i found out today that the 1976 model 120y diff is useless to try to get it in the 1200 its mounts are different the pinion yoke is to big for the tailshaft to bolt up to wat i did find is the 120y centre is much bigger than the 1200 so in theory it may be stronger so unless u get the tailshaft out of the 120y and get it mated up to the tail shaft in mine its no good oh well some times u have to learn the hard way looks like its the 31 skyline to be cut down.

Yes, use the 120Y driveshaft, and it's easy so I hear.

I thought the B210 (120Y) spring plates were in the same location as in the B110. The bolt holes might be bigger on the Japan differential though. In any case, moving the mounting plates over a bit is not very difficult, just measure and take to a welder's shop.