95 Series I with Series II parts from factory, any external indicators?

I've seen it mentioned a few times that some 95 Series I SC engines later in the 95 model year came with some of the Series II parts, specifically the Series II lighter crankshaft.

For example:

https://rivperformance.editboard.com/t1282p75-faq-series-i-sc-harmonic-balancer-diagnosis-installation

Karma wrote:

The good news for you here is that if you have the second design, you also have a chance of having the series 2 oil pan, different cam end cap, and lighter series 2 crank. The lighter S2 crank in the series 1 = rare factory freak for power.

So, I was wondering:

1) Is it confirmed that this happened and some Series I SC engines received Series II parts?

2) If so, has anyone also confirmed what parts were included and were they all included at the same time, or piece-meal?

3) And if so, are there any external or other indicators (e.g. VIN range?) that identify cars that had these Series II parts?


These things have happened before with other makes/models, so it seems reasonable it could be the case as Buick transitioned to the Series II and parts for the Series I began be exhausted on the line. Any clue?

Thanks,
Al

Harmonic Balancer is Only thing I've found so far. 95 vs 96 is about a 6 OZ weight on inside. The 95 version had my motor out of balance jumping/Vibrating. I would assume that some of the other items along the belt drive system are 96 as well.