Tony,
How is that power steer going?
How about grafting in a Jaguar XJ front?
Very similar to HR front except has two mounting "snouts" rather than outrigger.
You would need to fabricate upper shock tower mounts (relatively easy)
Rear mounted steering rack.
4 pot brakes!!
I've read about some of these x-members being narrowed as well (I don't know how safe this is but apparently it gets done).
5" stud pattern tho, could probably get them redrilled for Holden.
I've just managed to snaffle Jag front and rear ends!!.. no they arent being fitted to the project.... at this point in time.
Cheers
Ed