Stiffy...give WASP (World Austomotive Surplus Parts, ie. ballarat holden) a call on 03 5339 9333 talk to the manager Stewart Bresnahan.
Website:
www.autosurplusparts.com.au
See what he can do for you for a 6Ltr. That's where our L76's came from but they were never on the web site. Good service and pricing.
Tell him you are one of the cobra gang.