Thanks 1200RC
The beauty of our beloved Datsuns is that by knowing just which selected parts from other models to use, we can build a much improved automobile without needing to do too much fabricating or butchering to achieve the desired result.

The diff ratio in the alloy diff center from the 1000 will be 4.11 to 1 if it's from a passenger model, & 4.375 to 1 if it's from a commercial model, which includes the Van / Wagon.

Now,.. which models of Datsun used a rear disc brake system that will fit inside a 13" wheel. Hmmmmm. That might be a hard one. Any of the front drive cars perhaps? Even if it is a model that was not sold in Australia. I have a 1000 model remember, so i am really restricted to the original rear axle as any replacement is likely to be too wide.

EDIT
Hang about, if i remember rightly, the original Bluebirds of the early 60's used a rear axle that is dimentionally suitable. I wonder what diff center that they used, & what brake mounting flange also. Hmmmm.

To put things in perspective, Chryslers mainstream diff was the 8" model. They were used behind even the V8 engines
The H190 is dimentionally only about 10mm smaller in the ring gear. What does that tell us.

Thanks very much 1200Rallycar and Dodgeman - excellent info !!!
My H190 appears to have about a 4.6 :1 ratio so it will be a hillclimb special !! Will look for something around 4.1 : 1 (Bluebird 4 speed wagon you say ?) Yes, the Bluebird discs look like a bolt up once the backing plates are changed. Interestingly, inspired by your comments I placed an old axle from my coupe (H 145) next to the Bluebird and tried one of the 1200 shims on it. Lines up spot on. Axle dia for bearing mount measures identical as does the bearing retainer collett. Only issue to determine will be the setback comparison between axle flange and bearing. A machined spacer should rectify any discrepancy. If all went well, I could see a possability of a fairly easy fit up. I will keep you all posted with the outcome. Would like also to track down a 5 speed for the A14 - thought I saw one offered a little while back ? Let me know if it is still out there. (no use shortening a tailshaft for the H190 and run it with a 1200 4 speed !!! Cheers for now ... EDIT - My 13" wheels fit over both front and rear brake setups ! (very little clearence on rear - about 2.5mm but that's without any grinding or cutting)

some c20 vanette's came with a 4.1:1 ratio,
usually the passenger ones.the quick check seems to be alloy centre = 4.6:1,steel centre = 4.1:1,so cruise round some of the commercial wreckers,& you might find the right ratio.the problem with bluebird h190's are that they have large diameter axles,while the c20's have the same diameter as h165's.also,use the tailshaft from a h165 1200 ute,they are the correct length.where abouts are you r-fast,cause i know there are some c20's out at rushes pick & payless here in sydney.

G'day b310Gx,
i am in the Camden area and we have met briefly at oran park. The h190 I have came from pick & pay @ Blacktown (from a A15 vanette) but they do have a couple of 2.0 litre (?) ones as well. Nothing for the datto lover at Ingleburn yard but it's soooo clean and under cover ! Thanx for the tip on the ute tailshaft !! my bluebird diff is the H165 so axles match - sweeeet. Will still measure up on the H145 to test the disc rear end possibility as well.
Haven't pulled the centre out of the H190, but by turning the axle through 1 revolution 1 got about 4.6 so it's a screamer !! See you at the trck someday, Cheers

bump

OK guys

Bluebird S 1, 2 & 3, Vanette, 1200, 1200ute, 120Y (H145 not borg warner), Stanza, can't think of anymore off hand, oh yeah sunny, all use the same rear wheel bearing, what this means is the backing plates are interchangable.

H190, the nose is the same length as the H165, I know this because when I went from a H165 to a H190 in my old Rally car I didn't need to change the tail shaft.

Daniel Blues:- Are we able to have this priceless thread placed in the tech section??
Now can I confirm that if I go to the wrecker and get a rear disk setup off a Bluebird with a H165, then I will be able to put that on my coupe with a H165 on it. Also, will the braking system be balanced with 200B alooy girlocks and the solid disk up front? What master cylinder should I use for a dual system setup required for IPRA?
One more question, can I "slot or groove" a solid disk without damaging it or weakening it?

According to my parts book, the H190 diff in the 4 speed wagon came with a 3.89 to 1 ratio. [35/9]
This might be quite good for cruising, but may not be the hot setup for hillclimbing.

The front calipers from the late 200B [810] [Girlock] use the same pads & repair kit as the series 1 Bluebird only the caliper mounting lugs were diferent. If you use the serirs 1 rear disc brake setup, then modified 200B struts with these brakes will mean that the brakes match front & rear. The 200B master cylinder has the same specs as the series 1 master cylinder, even though it looks completely diferent. The booster is much smaller on the 200B & this may mean that it is a better proposition to adapt to a 1200. The pressure bias, front to rear, on the 200B & the series 1 Bluebird is 450lbs, while the series 2 Bluebird has a 550lb bias.

Converted, if you go to the wreckers and buy Bluebird rear discs, disc backing plates, and callipers they will bolt onto a 1200 ute (H165) diff. The other thing you will need are the bolts that hold the backing plates to the housing, the bluebird ones are longer.

Be careful when removing the backing plates from the Bluebird axles. DO NOT under any circumstances press against the Bluebird backing plate, they are alloy and you will destroy them.

The only other drama you might have is the hand brake levers clearing the rear springs. Keep in mind that the Bluebirds had their hand brake inside the rear disc.

Use a 200B master cylinder and 200B/Stanza front callipers. I didn't remove the pressure retaining valve from the rear on the one I did, but this was an application thing, I wanted to make sure there was no rear brake knock off, but that's a different story.

Have fun

oh yeah

make sure that the 1200ute axle forge flashing clear your new backing plates, it can be a drama if you have to pull off the nice new wheel bearing you've just pressed on