If you'd like to confirm your engine number as original .You'll need to get a authenticity letter from Holden . These letter can't confirm if you have a Sandman but does give you build details eg driveline configuration / options . If an engine number is submitted when the inquiry is made then Holden can confirm if it was original fitted to your vehicle. The inquiry can be made online and all the information you need is the Holden vin number (long skinny tag) and your engine number


http://www.holden.com.au/corporate/contactus