Hey gents. I have a HG premier that I put a shortened borgwarner diff in and want to change the stud pattern to HQ. Before I get the axles made up am I better off going hq drum brake backing plate or commodore backing plate?? If I go commodore backing plate will the hq drums work on that brake setup? Or will the HQ style backing plate bolt on to the borgy diff no problems? I believe the diff is an M75 with VN 31 spline axles. Cheers

You can use HK-HG backing plates or HQ to WB. But they are different offset, so you need to decide that prior to getting axles made. Both can be used with HQ-WB drums. HK-HG handbrake cables work the same with both.

Its hard to get the right size cylinders too for certain applications, so it'll also depend upon what front brakes you are running.

HQ-WB are easier to get shoes etc for, and standard application wheel cylinders are easier. I'd try and find original cylinders and get them rebuilt with stainless sleeves rather than buy Chinese junk.