[Rossba]

Darkside,

Mine started off with Kingswood rotors drill out to Ford stud pattern then I had to turn them down to fit a HQ calliper over it.
I did swap the spindle side to side and put the calliper on the rear as it cleared the crossmember better. This passed engineering no worries.
Not sure where you are or if you are still building the kit but if you plan to go bigger I could get my mate who helped with mine do the same to yours. He is in Geelong.
The seal was the biggest head ache to match the Ford hub to the Torana spindle, but all should be good and not scrub out.