Van Nuys Suppliers & Timelines

[RPOZ11]

Having spent a chunk of my working life in supply chain, here's my 2¢.

Some suppliers of common parts are required to be within a certain distance from the plant. I recall John Z mentioning that fuel tanks for Van Nuys were produced there, as were jacks certainly other components. Drive train components were not, VN had to maintain a larger inventory to cover. For 02A VN Z/28s the engine date to final assembly gap is 10-18 days; at Norwood it's about a week. One or two days is not unusual. 

Optional equipment was definitely a problem. Hard to predict and once locked into tooling capacity, nearly impossible to change. November 1968 Chevy stopped taking Z/28 orders as 302 engine production through the end of 1968 was spoken for.

This mention of the VN engine date gap helps answer somewhat for dates my engine has vs its build month and week; however not specifically on my car.
And these were Flint built.
My engine is Tonowanda.

Variations for this within you suggested timeline?

Any VN employees from then still with us who could elaborate?

[GMAD_Van Nuys]

In 1969, GM was still building vehicles at the Fremont and South Gate assembly plants, so engines were being shipped from the Tonowanda engine plant and also sent to Van Nuys.