Not sure on the specifics but aren’t P76 4.5” PCD? Are you running Ford or Chrysler rims?

The stubs are switched so callipers are to the front.
I tried swapping the steel part of the calliper arm but it fouls on the stub so best I can tell these can only go one way.
I haven't tried swapping the alloy part side to side but in doing so would put the bleed nipple on the low side so cant do that anyway.
Checked the rim and its rubbing on the alloy part of the calliper on the outer rim section(not the centre)

If calliper could move closer to the bearing by 3-4 mm it should be fine but I vant see where I can make it do this.
Tried another T/G 14 inch rim and it was the same.....

Yeah I can try and find one to see what it does.

Everything I have read says that HZ is a straight swap over.

I used blank P76 drilled to HT which is a hopper stopper kit and again should be straight forward.

Cant see what I've done wrong to get stuck like this

Thanks for the suggestions
There actually htg rims. I purchased the P76 rotors blank and had them drill to ht by hopperstopper. They also supplied the bearing spacers and stub to calliper spacer that brings everything in the 18mm compared to using HQ discs.this affects the track of the disc/calliper by reducing 18mm a side but
My problem is the calliper too far out. 15 inch rim would be fine but I wa t to stick with 14 inch.

Thought I had a win. I grabbed the old HQ discs and noticed that the distance from the wheel mating face to the disc face was about 5mm larger than my P76 disc. Great I thought that would push the rim further from the calliper.
It helped but didn't fix it. I'd need about 20mm wheel stud spacer plate to fix it and that defeats the point of the P76 disc and only masks the problem....

Waiting on a call from hopper stoppers to see if they have come across this before....

There are two smaller calipers, the HQ ones and the half alloy PBR. You could try them dummy fitted and see how you go. I may have some of the alloy PBR here I could take a photo of next to some HZ ones. I don’t think I have any HQ PBR though, I did have some L34 ones but sold them. I may have another L34 one here but I think I turfed it when I last moved.

Are you trying to fit 14x5 or 14x6 HT rims? The 6” rims have more backspace than 5” if I remember right.

Edited by user Wednesday, 17 July 2019 12:55:23 PM(UTC)  | Reason: Not specified

These are the two types of caliper I used many moons ago when I put redrilled Hq discs on my Hk. I was running 6" chromies at the time,

The bottom ones are Hq and needed grinding the front top surface area away to get enough clearance.
I replaced them with the top pbr ones and problem solved. I think they were off a Hx but someone here will verify that.
I think I used the original HK stub axles as well..Hope this Helps.

Wish I knew how to post photos.....
I put 19mm spacers on my threads and the wheel fits(an illegal I know) but it shows it's possible but only just.

All the rims I have. If you look at where the centre attaches the outer ring. Theres about 5mm before it tapers out wider. It's this taper that it hits the corner of the calliper.

I'm getting the backspace adjusted on the rear. I might get the backspace on the front reduced by 19mm effectively doing the same as the spacers. Might just get me by at minimal cost.

That is where mine come close too, right where the hoop steps in to meet the centre. The 15x6 Pontiac Rally rims come really close to the BF calipers there with 3 7/8” backspace. The rims I bought are 15x6 Chevelle SS rims but are 4” backspace so I’m hoping they still clear when they get here I can maybe use 1/8” spacers though as they were used standard on HK GTS.........will see if that floats if I have to. Here are my rims just out of interest, will try them first without dress rims
https://www.wheelvintiques.com/wheels/muscle/50-series-chevy-ss-396.html

For those interested. Got new centers/bands for the front pushing band as far out as I could.
Still not enough...... Changed HZ to HX brakes as recommended and with a little calliper "blending" and some wheel welds cleaned up it fits........
Of interest the P76 discs also made the wheel hit my tie rods with the old wheels. Due smaller distance between outer disc surface and wheel mating face.10mm less than old discs. But that was also fixed with the backspace change.
Absolute pita and should have just stayed Hq pattern but I got there.