I am wanting to keep the hk stud pattern on my car and was wondering if hq callipers will bolt onto my hk disk brake stubs. In turn will the hq stub axle bolt up to the hk wish bones, I'm sure they do but can you run a hk rotor on the hk stubs to keep the stud pattern?

Have a look on Hoppers Stoppers website, they explain a lot about fitting different brakes on old Holdens.

Did HX have PBR calipers and HZ have Girlock calipers?

The calipers didn't change right on the model change.

HQ, HJ & early HX had a choice of either PBR or Girlock, both in cast iron.

Most HX & early HZ got the PBR alloy type, & then the Girlock alloy type (similar to Commodore) was fitted to most HZs. WB also got alloy Girlocks but they differed slightly from the HZ ones.

AFAIK they are all interchangeable on the stub axles, the change to the mounting pad must've been quite minor.

Dr Terry

On the HK, You swap the stubs around, ie left goes on the right and vice versa.

Then the HQ Rotors and calipers bolt straight up.

I used Blank HQ rotors drilled for HK Pattern. Worked great, but could not use HK Wheels, needed to be HT or HG. I needed the HK slots so ended up having to modify the HK wheels a lot to get them to fit. But got there in the end.

But use HT or G wheels and you will be fine.

or any 15 inch or above wheel will go straight on.

very easy conversion.

Edited by user Saturday, 22 February 2014 5:19:52 AM(UTC)  | Reason: Not specified

coupe i think the problem with the hk rims is the offset, it causes the rims to rub on the larger calipers, at least that was my experience when converting the eh to hr front axles with hg disks.