Instead of the usual 3Mxxxxxxxx on the vin derivative pad. I noticed my engine is 3Zxxxxxxx

Plant of origin? 1972 model year.

 

Fremont, CA

 

The Chassis Service Manual, for one, has the plant codes.

http://wildaboutcarsonline.com/cgi-b...aldisplayed=50

Wild About Cars. http://wildaboutcars.com. An information supersource, especially Oldsmobile. More Olds content than anywhere else on the internet and continuing to grow.
You'll find Chassis Service Manuals, Product Information Manuals (AKA Assembly Manuals), Inspector's Manuals, and other documents that will contain this and much much more.
Dealer Brochures, magazine ads and articles, and the Automotive History Preservation Society library growing daily.
Free to join, free to learn.

 

Thanks fellas. Kurt I did join up at wildaboutcars when you first mentioned the project, but found it difficult to navigate. I'll stop back over soon, and see how things have progressed.

 

I expect you to be pleasantly surprised.