i think some of the wiki measurements are either not greatly accurate or are described wrong. the caliper mounting bolts are as you described. I'm running 15s, 14 is minimum. i haven't measured mine since the work was done but i gave a h165 housing and told them to make it the same.

I recently bought the same setup on a H165 diff. On mine the distance face to face on the disks is 1310mm. Which according to the wiki is 5mm wider than stock. I wonder if this was done for the clearance issues you're having? I haven't fitted it yet and probably wont for some time.

By right on top do you mean the mounting bolts are equally forward and behind of the diff housing? Mine it looks like one bolt is about on top and the other one is behind. You're making me think I should trial fit it before spending any more money. I just assumed it would fit since it came off a 120y.

Off topic: What wheels are you using with it? I'm going to have to get something bigger than my 13" to fit round the brakes.

Can't help much with the s13 brakes, if you want to come have a look at the setup I've got as a comparison shoot me a PM.

g'day, i have an issue where i have shortened my h190 to the h165 ute length (which essentially for the purpose of this thread means i have the same dimension as a h165 ute diff)

i have installed bluebird disc over drums on this diff, but in my lowered coupe the calipers and bleed nipples are hitting the car chassis and the inner body skin panel

i am now looking at what options i have. it may be possible to rotate the bluebird setup 10 degrees by redrilling the mounting holes on the backing plate. this may give me just enough clearance

but, i am now considering ditching the blubird setup and going to soething like the skyline r31 setup, the tech wiki gets very low on detail when it comes to mounting these to a h165, so i am wondering if anyone has done it and what exactly is involved.

it looks like the skyline setup can be mounted on the front side of the diff (oposed to the bluebird calipers which have to be mounted on top), which would give me acres of clearance